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HomeMy WebLinkAbout2024-10-07 ACHD Final Report Alexis Pickering,President Miranda Gold,Vice-President ACHD Jim Hansen,Commissioner Kent Goldthorpe,Commissioner 'ar ww�m Dave McKinney,Commissioner Date: October 4, 2024 To: Laren Bailey-Conger Group Staff Contact: Dawn Battles, Senior Planner Project Description: Summerlin West Trip Generation: This development is estimated to generate 3,094 vehicle trips per day, 312 vehicle trips per hour in the PM peak hour, based on the traffic impact study. Proposed Development Traffic Impact Study Meets All ACHD Policies PoliciesRequires Revisions to meet X ACHID IIf yes, is mitigation -•u i red Area Roadway Level of ■ Planned Service Improvements D• area roadways -- ■ LOS Planning Thresh ■ • • • Livable Street Performance Measures •Area •.• eet ACHD's LOS Planning Thresholds in Pedestrian the future with planned improvements? Is Transit • - • connecting you to more Ada County Highway District•3775 Adams Street•Garden City,ID•83714• PH 208387-6100•FX 345-7650•www.achdidaho.org Development Services Department 'ACHD connecting you to more Project/File: Summerlin West/ MPP24-0009 / H-2024-0023 This is an annexation with rezone from RUT (Rural-Urban Transition) to R-8 (medium density) and R-15 (medium-high density) and a preliminary plat application to allow for the development of a 367-lot subdivision consisting of 339 residential building lots and 28 common lots on 63-acres. This application also includes a development agreement with the City of Meridian. Lead Agency: City of Meridian Site address: 7524 & 7850 S. Locust Grove Road E. Columbia Road & S. Locust Grove Road Staff Approval: October 4, 2024 Applicant: Laren Bailey Conger Group 4824 W. Fairview Avenue Boise, ID 83706 Staff Contact: Dawn Battles, Senior Planner Phone: 208-387-6218 E-mail: dbattles achdidaho.org Report Summary: ACHD Planned Improvements............................................2 Level of Service Planning Thresholds.................................2 A. Site Specific Conditions of Approval ............................3 B. Vicinity Map.................................................................6 C. Site Plan ......................................................................7 D. Traffic Impact Study— Summary and Findings.............8 E. Findings for Consideration.........................................10 F. Policy.........................................................................16 G. Attachments...............................................................23 H. Standard Conditions of Approval ...............................24 I. Conclusions of Law....................................................24 Request for Appeal of Staff Decision ................................25 1 Summerlin West/ MPP24-0009/ H-2024-0023 ACHD Planned Improvements 1. Capital Improvements Plan (CIP)/ Integrated Five Year Work Plan (IFYWP): • Lake Hazel Road is scheduled in the IFYWP to be widened to 5-lanes from SH69 (Meridian Road) to Locust Grove Road and is currently under construction. • Locust Grove Road is listed in the CIP to be widened to 3-lanes from Lake Hazel Road to Amity Road between 2036 and 2040. • The intersection of Amity Road and Locust Grove Road is listed in the IFYWP to be constructed as a multi-lane roundabout with 1-lane for the northbound and southbound lanes and 2-lanes for the westbound and eastbound lanes with a construction year yet to be determined. • The intersection of Columbia Road and Locust Grove Road is listed in the CIP to be constructed as a single-lane roundabout with 2-lanes on the north, 2-lanes on the south, 2- lanes on the east leg and 2-lanes on the west leg between 2036 and 2040. • The intersection of Lake Hazel Road and SH-69 is listed in the CIP to be widened to 6-lanes on the north leg, 6-lanes on the south, 7-lanes on the east leg, and 7-lanes on the west leg and signalized between 2036 and 2040. • The intersection of Amity Road and SH-69 is listed in the CIP to be widened to 6-lanes on the north leg, 6-lanes on the south, 7-lanes on the east leg and 7-lanes on the west leg and signalized between 2031 and 2035. Level of Service Planning Thresholds 1. Condition of Area Roadways Traffic Count is based on Vehicles per hour(VPH) Roadway Frontage Functional PM Peak Hour PM Peak Hour Classification Traffic Count Level of Service Locust Grove Road 1,162-feet Minor Arterial 284 Better than "E" Columbia Road None Minor Arterial 230 Better than "E" * Acceptable level of service for a two-lane minor arterial is "E" (575 VPH). 2. Average Daily Traffic Count (ADT) Average daily traffic counts are based on ACHD's most current traffic counts. • The average daily traffic count for Locust Grove Road south of Lake Hazel Road was 3,152 on June 6, 2024. • The average daily traffic count for Columbia Road east of Locust Grove Road was 3,692 on March 20, 2024. 2 Summerlin West/ MPP24-0009 / H-2024-0023 A. Site Specific Conditions of Approval 1. Dedicate additional right-of-way to total 39-feet from the section line of Locust Grove Road abutting the site. Compensation will not be provided. 2. Improve Locust Grove Road with 17-feet of pavement from centerline plus a 3-foot wide gravel shoulder and construct a 10-foot wide detached concrete sidewalk, as proposed, located a minimum of 32-feet from the section line of Locust Grove Road abutting the site. 3. Construct a southbound left-turn lane on Locust Grove Road when Summerlin Drive is constructed to intersect Locust Grove Road. 4. Provide a road trust deposit to ACHD prior to ACHD's signature on the first final plat in the amount of $149,688 to pay for a '/4 of the widening of the bridge on Locust Grove Road over the Rawson Canal. 5. Construct an emergency access only onto Locust Grove Road located 430-feet south of Summerlin Drive and in alignment with Ambervale Street. Restrict the emergency access with a gate or bollards, located outside of the right-of-way, as determined by the appropriate fire department. 6. If this development moves forward before the collector is constructed north or south of the site, the applicant should be required to the following prior to ACHD's signature on the plat that includes Barchetta Avenue: • Dedicate right-of-way to accommodate for the future north/south collector roadway abutting the site • Provide a road trust deposit to ACHD in the amount of $169,102 prior to ACHD's signature on the plat that includes the north/south collector roadway to allow for the construction of the roadway when the parcels north or south of the site develop. OR If the joint construction project is agreed upon by the adjacent property owner's to construct the north/south collector from its current terminus at Discovery Park to the site's south property line, then construct Barchetta Avenue abutting the site's east property line as '/2 of a 36-foot wide collector street section with vertical curb, gutter, an 8-foot wide planter strip and 5-foot wide detached concrete sidewalk on the west side of the roadway with an additional 12-feet of pavement widening beyond the centerline of the roadway established for the street, a 3-foot wide gravel shoulder and borrow ditch sized to accommodate the roadway storm runoff on the east side of the roadway. Dedicate right-of-way to extend to 2-feet behind back of sidewalk on the west side and to 2-feet behind back of borrow ditch on the east side. 7. Provide a road trust deposit to ACHD in the amount of $299,376 to pay for of the crossing on Barchetta Avenue over the Rawson Canal to allow for the construction of the bridge in the future when the adjacent parcels develop, prior to ACHD's signature on the plat that includes Barchetta Avenue. 8. Construct the entrance roadways, Summerlin Drive, Delina Avenue and Ambervale Street, with two 21-foot wide travel lanes, an 8-foot wide center landscape island, vertical curb, gutter, an 8-foot wide landscape strip and 5-foot wide detached concrete sidewalk. Provide written approval from the appropriate fire department for the reduced street sections. 9. Construct bulb-outs on Summerlin Drive at the intersection with Glenmount Way and Crimson Clover Drive. Provide a minimum of 24-feet of pavement between the bulb-outs at the intersections and provide written fire department approval for use of the bulb-outs. Remove or relocate the proposed island on Summerlin Drive located near the intersection with Glenmount Way if it 3 Summerlin West/ MPP24-0009 / H-2024-0023 interferes with the bulb-out required to be constructed on Sumerlin Drive at the intersection with Glenmount Way. 10. Construct the following roadways as 33-foot wide street sections with curb, gutter and 5-foot wide attached concrete sidewalk (see image page 13): • Remaining segment of Summerlin Drive • Hillsgate Street, • Pipergate Avenue • Crimson Clover Drive • Mountainair Avenue • Cloudcroft Street • Summa Street 11. Construct the following roadways as 27-foot wide street sections with curb, gutter and 5-foot wide attached concrete sidewalk, as proposed (see image page 13): • Ambervale Street • Bluebell Street • Airmont Avenue • Springgate Avenue • Glenmount Way • Henniker Avenue 12. Provide written approval from the appropriate fire department for the reduced street sections. 13. Install "No Parking" signs on one side of the 27-foot wide streets. Coordinate a signage program with District Development Review staff. 14. Plat the 8-foot wide center landscape islands on Summerlin Drive, Delina Avenue and Ambervale Street as right-of-way owned by ACHD. The applicant or homeowner's association should enter into a license agreement for any landscaping proposed within the islands. 15. Countruct Mountainair Avenue to terminate at the intersection with Cloudcroft Street and construct Cloudcroft Street to terminate at the intersection with Henniker Avenue and construct shared driveways in the location of the proposed stub streets (see image on page 15). 16. Dedicate right-of-way to 2-feet behind back of sidewalk, or for detached sidewalk, reduce the right- of-way width to 2-feet behind the back of curb and provide a permanent right-of-way easement that extends from the right-of-way line to 2-feet behind back of sidewalk. 17. Construct Summerlin Drive to intersect Locust Grove Road located 700-feet south of Via Roberto Lane and 2,000-feet north of Columbia Road, as proposed. 18. Construct Ambervale Street to intersect the proposed collector, Barchetta Avenue, located 515-feet south of the site's northeast property line, as proposed. 19. Construct Glenmount Way to intersect Summerlin Drive located 1,121-feet east of Locust Grove Road, as proposed. 20. Construct the internal local streets to align or offset a minimum of 125-feet from any other streets. 4 Summerlin West/ MPP24-0009 / H-2024-0023 21. Construct Barchetta Avenue to stub to the site's south property line, if the north/south collector roadway is constructed abutting the site's east property line as part of a joint construction project noted in Finding 3. Install a sign at the terminus of Barchetta Avenue stating that, "THIS IS A DESIGNATED COLLECTOR ROADWAY. THIS STREET WILL BE EXTENDED AND WIDENDED IN THE FUTURE." 22. Construct a temporary cul-de-sac turnaround at the terminus of Barchetta Avenue, as it will extend greater in length than 150-feet. The temporary turnaround should be paved and be designed and constructed meeting the same dimensional requirements of a standard cul-de-sac. The developer shall grant a temporary turnaround easement to the District for those portions of the cul-de-sac which extend beyond the dedicated street right-of-way. In the instance where a temporary easement extends onto a buildable lot, the entire lot shall be encumbered by the easement and identified on the plat as a non-buildable lot until the street is extended. 23. Construct two local stub streets, one to the site's west property line in alignment with the proposed Summa Street and one to the site's north property line in alignment with the proposed landscape strip located between Lots 14 and 16 Block 10 (see image page 15). 24. Construct a stub street to the site's north property line in alignment with the stub street approved as part of the Hadler subdivision (see image page 15). 25. Install a sign at the terminus of all local stub streets stating, "THIS ROAD WILL BE EXTENDED IN THE FUTURE." 26. Construct three 20-foot wide shared driveways onto the internal local streets, as proposed. 27. Construct two 20-foot wide shared driveways, one onto Henniker Avenue in alignment with Cloudcroft Street and one onto Cloudcroft Street in alignment with Mountainair Avenue (see image page 15). 28. Redesign Summerlin Drive, Crimson Clover Drive, Cloudcroft Street and Summa Street to reduce the length or include passive design elements and submit a revised preliminary plat showing the redesigned roadways for review and approval prior to plan submittal for the first final plat. Speed humps/bumps and valley gutter will not be accepted as traffic calming. 29. Direct lot access is prohibited to Locust Grove Road and should be noted on the final plat 30. Submit civil plans to ACHD Development Services for review and approval. The impact fee assessment will not be released until the civil plans are approved by ACHD. 31. There will be an impact fee that is assessed and due prior to issuance of any building permits. The assessed impact fee will be based on the impact fee ordinance that is in effect at that time. The impact fee assessment will not be released until the civil plans are approved by ACHD. 32. Comply with all Standard Conditions of Approval. 5 Summerlin West/ MPP24-0009 / H-2024-0023 B. Vicinity Map It 1 / � I f I Cnlnmhia iW 6 Summerlin West/ MPP24-0009 / H-2024-0023 C. Site Plan 7 pp I I i S U M M E R L I N S U B D I V I S ION r MAY ze.7024 =+ JLNSENBELTS tto u� O MERIDIAN, ID PRELIMINARY PLAT LANDSCAPE PLAN °.n7 V=1 7 Summerlin West/ MPP24-0009 / H-2024-0023 D. Traffic Impact Study - Summary and Findings 1. Traffic Impact Study CR Engineering, Inc. prepared an abbreviated traffic impact analysis (TIA) for the proposed Summerlin West development and can be found under attachments on page 23. The analysis included trip generation, existing average daily traffic counts on Locust Grove Road, site access evaluation, a turn lane analysis for the Sumerlin Drive/Locust Grove Road intersection and an evaluation of the trips anticipated on internal roadways proposed within the development. a. Policy: Maximum Traffic on One Access Point: See Policy listed under F4 on page 16-17. b. TIS Findings: Staff has reviewed the submitted traffic impact analysis (TIA). Site Access Summerlin Drive was evaluated in the TIA as a local street and is proposed to be constructed to intersect Locust Grove Road located 700-feet south of Via Roberto Lane and meets District Local Street Intersection Spacing on Minor Arterials which requires a minimum offset of 660- feet from all other roadways. Additionally, the Locust Grove Road/Summerlin Drive intersection is anticipated to operate at an acceptable Level of Service planning thresholds in both the AM and PM peak hours under 2030 total traffic conditions. Turn Lane The TIA states a southbound left-turn lane is warranted on Locust Grove Road at the intersection with Summerlin Drive when the site generates 100 PM peak hour trips, or when 100 lots are platted. Internal Roadways Traffic Volume Threshold Evaluation • The TIA indicates that the site will only have 1 local road access, Summerlin Drive, until the north/south collector roadway abutting the site's east property line can be constructed between Lake Hazel Road and Columbia Road. • The TIA notes that the total traffic on Summerlin Drive is anticipated to be 3,094 average daily trips (ADT) at the entrance portion of the site, 2,150 ADT for the segment between Delina Avenue and Glenmount Way and 1,880 ADT for the segment between Glenmount Way and Crimson Clover (see image page 7) which exceeds ACHD's maximum traffic on one local street access. • Additionally, there is a short segment of Crimson Clover Drive, a local street, that is anticipated to exceed the allowable 1,000 ADT for new local streets. • The TIA states that 100 units can be constructed and occupied before exceeding the allowable 1,000 ADT threshold for maximum traffic on one access. c. Staff Comments/Recommendations: Staff comments are provided by District Traffic Services and Development Review staff. The applicant should be required to construct the southbound left-turn lane on Locust Grove Road when Summerlin Drive is constructed to intersect Locust Grove Road. Although the TIA evaluated Summerlin Drive as a local street, the applicant is proposing to construct the entry portion of Summerlin Drive from Locust Grove to Delina Avenue as a collector roadway with no front-on housing. The average daily trip (ADT) policy threshold that has one access to a public street that is classified as a collector is typically 3,000 ADT and a public street that is classified as a local street is typically 1,000 ADT. As noted in the TIA, Summerlin Drive will exceed ACHD's allowed maximum forecast ADT of 3,000 with the addition of 300 lots and a portion of Crimson Clover Drive will exceed ACHD's allowable maximum forecast ADT of 1,000 with the addition of 100 lots (see image page 10). Therefore, if the 8 Summerlin West/ MPP24-0009 / H-2024-0023 north/south collector roadway has not been constructed south of the site to intersect Columbia Road or north of the site connecting to Recreation Avenue providing secondary public street access to the site, then staff recommends that the applicant stop final platting prior to ACHD's signature on the final plat that contains the 101st lot. While the TIA states the total traffic on Summerlin Drive is anticipated to be 3,094 ADT at the entrance portion of the site, staff recommends approval of a local street with the higher average daily trips, as the entrance portion of the roadway is proposed to function as a collector street with no-front on housing and Summerlin Drive is anticipated to have an ADT of less than 2,000 trips per day at build-out with the construction of the north/south collector connecting to Columbia Road or Lake Hazel Road, meeting District policy. 9 Summerlin West/ MPP24-0009 / H-2024-0023 E. Findings for Consideration 1. Maximum Traffic on One Access Point-Summerlin Drive a. Applicant's Proposal: The applicant is proposing to construct the entrance roadway, Summerlin Drive, to intersect Locust Grove Road as a local street which is anticipated to carry 3,094 vehicle trips per day. The applicant is proposing to construct two stub streets to the adjacent parcels. Via Rcberto Ln 6 Hadfer Subdivision 7DD' (in-Process) I Ln Private). 3 094 Siftes� 944 215 430 500 190 1 880 - 500 280 i 3xszend= M ' — — — Straight roadway segment exceeds 750' ., j needing traffic calming measure — •Future collector street 2,DDD' ADT lqolumbia Rd b. Staff Comments/Recommendations: ACHD policy limits developments with only one access point to 1,000 trips per day for local streets. Sole access to this site is proposed to be provided by a local street, Summerlin Drive. Secondary Access is proposed to be provided via a new north/south collector roadway abutting the site's east property line. Typically, ACHD would limit the development to 1,000 trips per day or the final platting of 100 building lots until secondary access is provided. However, the applicant is proposing to construct an emergency access only onto Locust Grove Road providing a secondary emergency access. 2. Locust Grove Road a. Existing Conditions: Locust Grove Road is improved with 2-travel lanes, 24-feet of pavement and no curb, gutter or sidewalk abutting the site. There is 58-feet of right-of-way for Locust Grove Road (22-feet from centerline). 10 Summerlin West/ MPP24-0009 / H-2024-0023 b. Applicant Proposal: The applicant is proposing to improve Locust Grove Road with a 10-foot wide detached concrete sidewalk abutting the site. The applicant is proposing to construct an emergency access only onto Locust Grove Road located 430-feet south of Summerlin Drive and in alignment with Ambervale Street. c. Staff Comments/Recommendations: The centerline of Locust Grove Road abutting the site is not centered on the section line and is offset approximately 12 to 14-feet west of the existing centerline of the roadway. Consistent with prior actions in the vicinity of the site, sidewalk location and right-of-way dedication on Locust Grove Road should be measured from the section line of the roadway abutting the site. The applicant's proposal to construct a 10-foot wide detached concrete sidewalk exceeds District policy which requires the construction of 5-foot wide detached concrete sidewalk and should be approved, as proposed. The applicant should be required to locate the sidewalk a minimum of 32-feet from the section line of Locust Grove Road. Consistent with the MSM, the applicant should be required to dedicate additional right-of-way to total 39-feet from section line of Locust Grove Road abutting the site. The additional dedicated right-of-way is not impact fee eligible for compensation, as this segment of Locust Grove Road is not scheduled in the CIP. The applicant should be required to improve Locust Grove Road with 17-feet of pavement from centerline plus a 3-foot wide gravel shoulder abutting the site. Consistent with the findings and recommendations of the TIA, the applicant should be required to construct a southbound left-turn lane on Locust Grove Road when Summerlin Drive is constructed to intersect Locust Grove Road. To accommodate the future widening of the bridge on Locust Grove Road over the Rawson Canal, the applicant should be required to provide a road trust deposit to ACHD in the amount of$149,688 to pay for a '/4 of the widening of the bridge over the Rawson Canal and should be provided prior to ACHD's signature on the first final plat. The applicant's proposal to construct an emergency access only onto Locust Grove Road meets District policy and should be approved, as proposed. The emergency access should be restricted with a gate or bollards, located outside of the right-of-way, as determined by the PHASE 1 y.� appropriate fire department. —PHASE 3 == + PHASE 1 T _ .. EMERGENCY ACCESS ONLY "`4o 3. Barchetta Avenue-North/South Collector a. Existing Conditions: Barchetta Avenue is not constructed abutting the site. b. Applicant Proposal: The applicant is proposing to construct Barchetta Avenue abutting the site's east property line as '/z of a 36-foot wide collector street section with vertical curb, gutter, an 8-foot wide planter strip and 5-foot wide detached concrete sidewalk within 31.5-feet of right- of-way. 11 Summerlin West/ MPP24-0009 / H-2024-0023 c. Staff Comments/Recommendations: The applicant's proposal to construct Barchetta Avenue meets District policy with the exception of no additional pavement on the east side of the roadway. Consistent with ACHD's Half Street policy the applicant should be required to improve the east side of the roadway with an additional 12-feet of pavement widening beyond the centerline of the roadway established for the street, with a 3-foot wide gravel shoulder and borrow ditch sized to accommodate the roadway storm runoff. Dedicate right-of-way to extend to 2-feet behind back of sidewalk on the west side and to 2-feet behind back of borrow ditch on the east side. Staff is supportive of the applicant's proposal to construct the collector abutting the site's east property line. However, the collector roadway is not constructed directly north or south of the site and a "floating" piece of right-of-way is not desired. The applicant has indicated that they are coordinating with the area property owners to construct the collector and anticipate that it will be from its current terminus at Discovery Park to the site's south property line as part of a joint construction project. If this development moves forward before the collector is constructed north or south of the site, the applicant should be required to the following: • Dedicate right-of-way to accommodate for the future north/south collector roadway abutting the site • Provide a road trust deposit to ACHD in the amount of $169,102 prior to ACHD's signature on the plat that includes the north/south collector roadway to allow for the construction of the roadway when the parcels north or south of the site develop. The Rawson Canal runs east/west along the site's south property line and a bridge is required to be constructed on Barchetta Avenue over the Rawson Canal. However, the adjacent parcels to the east and south have not developed making it infeasible to construct a bridge. The applicant should be required to provide a road trust deposit to ACHD in the amount of$299,376 to pay for % of the crossing and allow for the construction of the bridge in the future when the adjacent parcels develop. The road trust deposit for the crossing of the Rawson Canal should be provided prior to ACHD's signature on the plat that includes Barchetta Avenue. 4. Internal Local Streets a. Existing Conditions: There are no local streets within the site. b. Applicant's Proposal: The applicant is proposing to construct the entrance roadways, Summerlin Drive at the intersection with Locust Grove Road and near the intersection with Glenmount Way and Delina Avenue and Ambervale Street, with two 21-foot wide travel lanes, an 8-foot wide center landscape island, vertical curb, gutter, an 8-foot wide landscape strip and 5-foot wide detached concrete sidewalk within 77-feet of right-of-way. The applicant is proposing to construct the remaining portion of Summerlin Drive as a 33-foot wide local street section with vertical curb, gutter, an 8-foot wide planter strip and 5-foot wide detached concrete sidewalk within 60-feet of right-of-way. The applicant is proposing to construct Hillsgate Street, Pipergate Avenue, Crimson Clover Drive and Mountainair Avenue as 33-foot wide street sections with curb, gutter and 5-foot wide attached concrete sidewalk within 44-feet of right-of-way (shown in pink below). The applicant is proposing to construct Ambervale Street, Bluebell Street, Airmont Avenue, Springgate Avenue, Glenmount Way and Henniker Avenue, Cloudcroft Street and Summa Street as 27-foot wide local street sections with curb, gutter and 5-foot wide attached concrete sidewalk within 38-feet of right-of-way. 12 Summerlin West/ MPP24-0009 / H-2024-0023 W a - w Z;,tij Uj of 11~ wow . . . . . . . . wow. c. Staff Comments/Recommendations: The applicant's proposal to construct the entrance roadways, Summerlin Drive, Delina Avenue and Ambervale Street, with two 21-foot wide travel lanes meets District policy and should be approved as proposed. As noted above, Summerlin Drive is anticipated to exceed ACHD's allowable threshold for a local street. However, staff recommends approval of a local street with the higher average daily trips, as the entrance portion of the roadway is proposed to function as a collector street with no-front on housing and Summerlin Drive is anticipated to have an ADT of less than 2,000 trips per day at build-out with the construction of the north/south collector connecting to Columbia Road or Lake Hazel Road, meeting District policy. The applicant should be required to construct bulb-outs on Summerlin Drive at the intersections with Glenmount Way and Crimson Clover Drive. Provide a minimum of 24-feet of pavement between the bulb-outs at the intersections and provide written fire department approval for use of the bulb-outs. The applicant should be required to remove or relocate the proposed island on Summerlin Drive located near the intersection with Glenmount Way if it interferes with the bulb-out required to be constructed on Sumerlin Drive at the intersection with Glenmount Way. The applicant's proposals to construct 27-foot wide street sections meets District policy and should be approved as proposed with the exception of Summa Street and Cloudcroft Street. Summa Street is required to stub to the site's west property line and has the potential to exceed ACHD's allowable 1,000 vehicle trips per day for a reduced street section. Because Summa Street has the potential to exceed ACHD's allowable threshold and to allow for parking on both sides of the street, staff recommends the applicant construct Summa Street and Cloudcroft Street as 33-foot wide street section with curb, gutter and 5-foot wide concrete sidewalk to allow parking on both sides of the street. 13 Summerlin West/ MPP24-0009 / H-2024-0023 The applicant should be required to provide written approval from the appropriate fire department for the reduced street sections. Parking is restricted on one side of the 27-foot street sections. The applicant should be required to install "No Parking" signs on one side of the streets. Coordinate a signage program with District Development Review staff. The 8-foot wide center landscape islands on Summerlin Drive, Delina Avenue and Ambervale Street should be platted as right-of-way owned by ACHD. The applicant or homeowner's association should enter into a license agreement for any landscaping proposed within the islands. The proposed stub streets at the terminus of Mountainair Avenue and Cloudcroft Street are required to be shifted towards the center of the block, see Finding 7 for locations. Therefore, staff recommends Mountainair Avenue be constructed to terminate at the intersection with Cloudcroft Street and Cloudcroft Street be constructed to terminate at the intersection with Henniker Avenue and construct shared driveways in the location of the proposed stub streets (see image page 15). The applicant should be required to dedicate right-of-way to 2-feet behind back of sidewalk, or for detached sidewalk, the applicant may reduce the right-of-way to 2-feet behind back of curb and provide a permanent right-of-way easement that extends from the right-of-way line to 2-feet behind back of sidewalk. 5. Roadway Offsets a. Existing Conditions: There are no roadways within the site. b. Applicant's Proposal: The applicant is proposing to construct a new local street, Summerlin Drive, to intersect Locust Grove Road located 700-feet south of Via Roberto Lane and 2,000- feet north of Columbia Road. The applicant is proposing to construct a local street, Ambervale Street, to intersect the proposed collector, Barchetta Avenue, located 515-feet south of the site's northeast property line. The applicant is proposing to construct the internal local streets to align or offset a minimum of 125-feet. c. Staff Comments/Recommendations: The applicant's proposals meet District policy and should be approved, as proposed. 6. Stub Streets a. Existing Conditions: There are no existing stub streets to and from the site. b. Applicant Proposal: The applicant is proposing to construct a collector street, Barchetta Avenue, located at the site's east property line to stub to the site's north and south property lines. The applicant is proposing to construct two local stub streets located as follows: • Cloudcroft Street to the west located 105-feet south of the site's northeast property line. • Mountainair Avenue to the north located 173-feet west of the proposed north/south collector roadway, Barchetta Avenue. c. Staff Comments/Recommendations: If the north/south collector roadway is constructed abutting the site's east property line as part of a joint construction project noted in Finding 3 above, then the roadway should be approved to stub to the site's south property line, as 14 Summerlin West/ MPP24-0009 / H-2024-0023 proposed. Install a sign at the terminus of Barchetta Avenue stating that, "THIS IS A DESIGNATED COLLECTOR ROADWAY. THIS STREET WILL BE EXTENDED AND WIDENDED IN THE FUTURE." If the north/south collector roadway has not been constructed north or south of the site, then right-of-way dedication and a road trust deposit should be required as noted above in Finding 3. The applicant should be required to construct a temporary cul-de-sac turnaround at the terminus of Barchetta Avenue, as it will extend greater in length than 150-feet. The temporary turnaround should be paved and be designed and constructed meeting the same dimensional requirements of a standard cul-de-sac. The developer shall grant a temporary turnaround easement to the District for those portions of the cul-de-sac which extend beyond the dedicated street right-of- way. In the instance where a temporary easement extends onto a buildable lot, the entire lot shall be encumbered by the easement and identified on the plat as a non-buildable lot until the street is extended. The applicant's proposal to construct two local stub streets, Cloudcroft Street and Mountainair Avenue, meet District policy. However, staff recommends the stub streets be located centrally within the blocks to provide better site circulation for the adjacent parcels to the north and west of the site. Additionally, a stub street to the site's west property line located centrally within the block may prevent the possibility of double fronted lots and the construction of a cul-de-sac on the adjacent parcel to the west, as there is long-term maintenance costs associated with cul- de-sac turnarounds. Therefore, the applicant should be required to provide a stub street to the site's west property line in alignment with the proposed Summa Street and provide a stub street to the site's north property line in alignment with the proposed landscape strip located between Lots 14 and 16 Block 10 (see image below). There is an approved stub street as part of the Hadler Subdivision located north of the site, shown below. There is an existing private road, Cavalli Lane, separating this site and Hadler Subdivision that will be required to be closed at the intersection with Locust Grove Road when the parcels to the east being served by this roadway develop. To allow for the stub street that was approved as part of Hadler Subdivision to be extended in the future and allow for site circulation, the applicant should be required to provide a stub street to the site's north property line and in alignment with the stub street approved with the Hadler subdivision. APPROVED STUB STREET- HADLER SUBDIVISION � i i ETS .. .- L WEST -._-------------- _._ �-------------- I F� _ } V' I ASES II /PHASE 9 `�� •, I r PHASE 2 ,x i ••• ,••. 15 Summerlin West/ MPP24-0009 / H-2024-0023 The applicant should be required to install a sign at the terminus of all local stub streets stating, "THIS ROAD WILL BE EXTENDED IN THE FUTURE." A temporary turnaround is not required at the terminus of the required stub street in alignment with Summa Street and the stub street in alignment with the proposed landscape strip located between Lots 14 and 16 Block 10, as they are not anticipated to extend greater in length than 150 feet. 7. Driveway 7.1 Internal Local Streets a. Existing Conditions: There are no local streets within the site. b. Applicant's Proposal: The applicant is proposing to construct three 20-foot wide shared access driveways onto internal local streets. c. Staff Comments/Recommendations: The applicant's proposal meets District policy and should be approved, as proposed. The applicant should be required to construct two 20-foot wide shared driveways, one onto Henniker Avenue in alignment with Cloudcroft Street and one onto Cloudcroft Street in alignment with Mountainair Avenue as stated in Finding 4c and shown on image above. 8. Traffic Calming a. Applicant's Proposal: The applicant is proposing to construct Summerlin Drive, Crimson Clover Drive, Cloudcroft Street and Summa Street greater in length than 750-feet. b. Staff Comments/Recommendations: The applicant should be required to redesign the above listed roadways to reduce the length or include passive design elements and submit a revised preliminary plat showing the redesigned roadways for review and approval prior to plan submittal for the first final plat. Speed humps/bumps and valley gutter will not be accepted as traffic calming. 9. Bridge for Rawson Canal Crossing The District will require that the applicant have ACHD approved plans for the crossing of the Rawson Canal prior to the pre-construction meeting and final plat approval. Note: Timing of project plan submittals should take into account review times, lead time for precast members and potential roadway closures. To ensure construction prior to irrigation season, approval of the project plans must be attained by January 15'. The District retains the right to modify road closure approvals on any project based on the needs of the District. Construction of projects approved after January 15t" may be postponed until after irrigation season is over in October. It is recommended that bridge submittals be submitted before the end of the current irrigation season to ensure the best time frame for construction is attained. Submittals will need to include the street section extending over the bridge to ensure the requirements of the roadway are met. 10. Other Access Locust Grove Road is classified as a minor arterial roadway. Other than the access specifically approved with this application, direct lot access is prohibited to this roadway and should be noted on the final plat. F. Policy 1. Federal Accessibility Design Guidelines and Standards District policy 7203.1.1 states that developers shall follow the current version of the U.S. Access Board's Accessibility Guidelines for Pedestrian Facilities in the Public Right-of-Way(PROWAG), 36 CFR Part 1190, September 7, 2023; (Also see, https//www.access-board.gov/prowag and https//www.access-board.gov/files/prowag/planning-and-design-for-aIternatives.pdf for additional information). 16 Summerlin West/ MPP24-0009 / H-2024-0023 2. Minor Improvements Minor Improvements Policy: District Policy 7203.3 states that minor improvements to existing Highways adjacent to a proposed development may be required. These needed transportation facilities are to correct deficiencies or replace deteriorated facilities. Included are sidewalk and/or bike lane construction or replacement (with physical buffers if missing and needed); construction of transitional sidewalk segments; crosswalk construction or replacement; curb and gutter construction or replacement; repair, replacement or expansion of curb extensions; replacement of unused driveways with curb, gutter, sidewalk, repair or addition of traffic calming or speed mitigation features; installation or reconstruction of pedestrian ramps; pavement repairs; signs, motor vehicle, pedestrian and bicycle traffic control devices; and other similar items. The current version of PROWAG will determine the applicable accessibility requirements for alterations and elements added to existing streets. ACHD staff is responsible for identifying the minor improvements that would be proportionate to the size and complexity of the development. 3. Livable Street Performance Measures District policy 7203.8 states that ACHD has adopted performance measures (level of stress) for evaluating the experience of bicyclists and pedestrians. ACHD seeks to create a transportation network that serves all ages and abilities. Bike and pedestrian facilities built through development should achieve a bike and pedestrian level of traffic stress 1 or 2, with no new bike lane below a minimum of 5-feet. 4. Maximum Traffic on One Access Point Maximum Traffic on One Access: District policy 7207.3.3 states that if a proposed development only has one access to a public street that is a local street, or if it proposes to extend public streets from existing development with only one local street access to the public street system, the maximum forecast ADT to be allowed at any point on a local street access is 1,000 and is subject to fire department requirements for the provision of a secondary access. This volume may be reduced or increased based on information received from the lead land use agency, the applicable fire department, and/or emergency services. The District will also take into consideration the following items when determining whether or not to reduce or increase the maximum allowable ADT: railroad crossings, canal crossings, topography (foothills vs. flat land), pedestrian connectivity, location of schools, etc. Average Daily Traffic (ADT): District policy 7207.3.1 states that ADT on new and existing local streets should typically be less than 2,000. This ADT applies to both existing and new streets. For new streets that are stubbed to connect to adjacent land that is not fully developed, the allowable ADT for the new street will typically be no more than 1,000 ADT, to accommodate future additional traffic from the adjacent land, depending on the size of the adjacent undeveloped land. When stub streets are connected and properties fully developed, local streets should not exceed 2,000. In developed areas where streets already exceed 2,000 ADT or are close to exceeding 2,000 ADT, the Commission may grant approval to exceed 2,000 ADT based on existing zoning of undeveloped properties or infill development. The Commission may also consider the need for additional roadway improvements or traffic calming to mitigate the additional traffic if necessary. The ADTs listed above are desirable planning thresholds for local streets, not roadway capacities. Actual roadway capacities are much higher than the planning thresholds. 5. Locust Grove Road Arterial Roadway Policy: District Policy 7205.2.1 states that the developer is responsible for improving all street frontages adjacent to the site regardless of whether or not access is taken to all of the adjacent streets. Improvements shall include transitional segments in accordance with the current version of PROWAG. 17 Summerlin West/ MPP24-0009 / H-2024-0023 Master Street Map and Typology Policy: District Policy 7205.5 states that the design of improvements for arterials shall be in accordance with District standards, including the Master Street Map, Livable Streets Design Guide, and the most current ACHD Livable Streets Performance Measures Plan as adopted by the ACHD Commission. The developer or engineer should contact the District before starting any design. Street Section and Right-of Way Width Policy: District Policy 7205.2.1 & 7205.5.2 states that the standard 3-lane street section shall be 37-feet (back-of-curb to back-of-curb). This width typically accommodates a single travel lane in each direction, and a continuous center left-turn lane, and curbs and gutters. A 3-lane road shall also include a minimum 10-foot wide multi-use path on both sides with at 8-foot wide buffer from back-of-curb. Other bike facility treatments as defined in the ACHD Bike Master plan may be approved at the discretion of the ACHD Development Review Supervisor. If an interim on-street bike lane is required in order to connect to existing facilities, the street section shall be 53-feet to allow for a 5-foot wide bike lane and 3-foot wide painted buffer. Landscaped medians with intermittent turn lanes may be allowed when a minimum of 20-feet of pavement on both sides of the median is provided. If a landscaped median is included in any of these cross sections, the landscaping shall be maintained by license agreement with the adjacent HOA, property owner, or by interagency agreement with the corresponding land use jurisdiction. At the discretion of Traffic Engineering staff, adjustments may be made to the street section, including removal of the continuous center turn lanes or modification to lane widths, where no driveways or intersections are present or to ensure adequate space for pathway and buffers. Right-of-Way Dedication: District Policy 7205.2 states that The District will provide compensation for additional right-of-way dedicated beyond the existing right-of-way along arterials listed as impact fee eligible in the adopted Capital Improvements Plan using available impact fee revenue in the Impact Fee Service Area. No compensation will be provided for right-of-way on an arterial that is not listed as impact fee eligible in the Capital Improvements Plan. The District may acquire additional right-of-way beyond the site-related needs to preserve a corridor for future capacity improvements, as provided in Section 7300. Pedestrian Facilities: District Policy 7205.5.7 requires a concrete sidewalk at least 5-feet wide are required on both sides of all arterial streets. A parkway strip at least 8-feet wide between the back- of-curb and street edge of the sidewalk is required to provide increased safety and protection of pedestrians. Alternatively, on roadways identified for improvement in the Capital Improvement Plan, a minimum 10-foot wide multi-use path may be required. The path shall be placed in accordance with planned buildout in the Master Street Map with a minimum 8-foot wide planter strip as measured to the closest edge of the path. Street trees are encouraged between the pedestrian facility and the roadway when irrigation and maintenance will occur by the adjacent property owner or HOA through an approved license agreement. Consult the District's planter width policy if trees are to be placed within the parkway strip. In some instances, to match existing conditions, a minimum 7-foot wide sidewalk may be constructed next to the back-of-curb. ACHD Development Review staff will be responsible for determining the required facility. Vertical hardscape alternatives to street trees may be considered in the buffer space when street trees are not practicable. Detached sidewalks and multi-use paths are encouraged and should be parallel to the adjacent roadway. Pedestrian facilities will only be allowed to deviate from a straight line parallel to the roadway when authorized by Development Review staff to accommodate site specific conditions (i.e., street trees, utilities, etc.). Appropriate easements shall be provided if public pedestrian facilities are placed out of the right-of- way. The easement shall encompass the entire area between the right-of-way line and 2-feet behind 18 Summerlin West/ MPP24-0009 / H-2024-0023 the back edge of the pedestrian facility. Pedestrian facilities shall either be located wholly within the public right-of-way or wholly within an easement. Curb ramps or blended transitions shall be provided to connect the pedestrian access route at each pedestrian street crossing in accordance with the current version of PROWAG. Provide detectable warning surface in accordance with the current version of PROWAG. Frontage Improvements Policy: District Policy 7205.2.1 states that the developer shall widen the pavement to a minimum of 17-feet from centerline plus a 3-foot wide gravel shoulder adjacent to the entire site. Curb, gutter and additional pavement widening may be required (See Section 7205.5.5). ACHD Master Street Map: ACHD Policy Section 3111.1 requires the Master Street Map (MSM) guide the right-of-way acquisition, arterial street requirements, and specific roadway features required through development. This segment of Locust Grove Road is designated in the MSM as a Residential Arterial with 3-lanes and on-street bike lanes, a 46-foot street section within 78-feet of right-of-way. 6. Internal Local Streets Local Roadway Policy: District Policy 7207.2.1 states that the developer is responsible for improving all local street frontages adjacent to the site regardless of whether or not access is taken to all of the adjacent streets. Street Section and Right-of-Way Policy: District Policy 7207.5 states that right-of-way widths for all local streets shall generally not be less than 47-feet wide and that the standard street section shall be 33-feet (back-of-curb to back-of-curb). Standard Urban Local Street-33-foot Street Section and Right-of-way Policy: District Policy 7207.5.2 states that the standard street section shall be 33-feet (back-of-curb to back-of-curb) for developments with any buildable lot that is less than 1 acre in size. This street section shall include curb, gutter, and minimum 5-foot wide concrete sidewalks on both sides and shall typically be constructed within 47-feet of right-of-way. Reduced Urban Local Street-27-foot Street Section and Right-of-Way Policy: District Policy 7207.5.2 states that the width of a reduced urban local street shall be 27-feet(back-of-curb to back- of-curb) with curb, gutter, and minimum 5-foot concrete sidewalks on both sides and shall typically be within 41-feet of right-of-way. Unless approved in writing by the land use agency, this street section is not allowed by the City of Kuna and City of Star. In some cases, this street width may not accommodate new utilities. A 29-foot street section within 43-feet of right-of-way may be constructed in lieu of a 27-foot street section if the applicant demonstrates that the additional roadway width is necessary to extend the utilities.Although some parking is allowed by the following subsections, the District will further restrict parking on a reduced width street if curves or other physical features cause problems, if actual emergency response experience indicates that emergency vehicles may not be able to provide service, or if other safety concerns arise. One of the following three sets of design conditions shall apply. Design Condition #1: Parking is allowed on one side of a reduced width street when all of the following criteria are met: • The street is in a residential area. • The developer shall provide written approval from the appropriate fire department or emergency response unit in the jurisdiction. • The developer shall install NO PARKING signs on one side of the street, as specified by the District and as specified by the appropriate fire department. • This street section shall include curb, gutter, and minimum 5-foot wide concrete sidewalks on both sides and shall typically be constructed within 41-feet of right-of-way. 19 Summerlin West/ MPP24-0009 / H-2024-0023 • Traffic volumes on the street shall not exceed 1,000 vehicle trips per day. There shall be no possibility that another street may be connected to it in a manner that would allow more than 1,000 vehicle trips per day. Design Condition #2: Parking is allowed on both sides of a reduced width street when the street layout has the qualities of a road grid system. This provides fire trucks and other emergency vehicles alternate routes of access since the ability to pass another vehicle may be compromised by placement of parked vehicles on both sides of the street. The following criteria shall be met: • The street is in a residential area. • The developer shall provide written approval from the appropriate fire department or emergency response unit in the jurisdiction. • The block length of the street shall not exceed 500-feet, measured between centerlines. • Traffic volumes on the street are not forecast to exceed 400 vehicle trips per day. • A minimum of two street connections shall be provided to each end of the street with the reduced width. The two connecting streets shall each connect to the larger street system to provide the intended alternate routes of access. A street system that has one street connection to the larger street network on one end and a loop/circle street on the other end with no outlet shall not be approved. • This street section shall include curb, gutter, and minimum 5-foot wide concrete sidewalks on both sides and shall typically be constructed within 41-feet of right-of-way. Design Condition #3: Parking is allowed on both sides of a reduced width residential street with passing pockets that are created when two driveways are constructed near the same property line, where a 50-foot segment will not have on—street parking on the side of the street with the driveways. This provides fire trucks and other vehicles areas to move to the side of the street to allow another vehicle to pass when vehicles are parked on the street. Parking is allowed on both sides of a reduced width street when the following criteria are met: • The street is in a residential area. • The developer shall provide written approval from the appropriate fire department or emergency response unit in the jurisdiction. • Driveway locations are predetermined with curb cuts for the driveways to be installed when the street is constructed. The curb cuts shall be 20-feet wide. Each lot on the street will be paired with an adjacent lot. If there are an odd number of lots, one lot at either end of the street will not be paired. Each pair of lots shall locate its driveway 5-feet from the shared lot line of the pair. • This street section shall include curb, gutter, and minimum 5-foot wide concrete sidewalks on both sides and shall typically be constructed within 41-feet of right-of-way. • The lots cannot abut an alley. • Traffic volumes on the street are not forecast to exceed 400 vehicle trips per day. Continuation of Streets Policy: District Policy 7207.2.4 states that an existing street, or a street in an approved preliminary plat, which ends at a boundary of a proposed development shall be extended in that development. The extension shall include provisions for continuation of storm drainage facilities. Benefits of connectivity include but are not limited to the following: • Reduces vehicle miles traveled. • Increases pedestrian and bicycle connectivity. • Increases access for emergency services. • Reduces need for additional access points to the arterial street system. 20 Summerlin West/ MPP24-0009 / H-2024-0023 • Promotes the efficient delivery of services including trash, mail and deliveries. • Promotes appropriate intra-neighborhood traffic circulation to schools, parks, neighborhood commercial centers, transit stops, etc. • Promotes orderly development. Sidewalk Policy: District Policy 7207.5.7 states that five-foot wide concrete sidewalk is required on both sides of all local street, except those in rural developments with net densities of one dwelling unit per 1.0 acre or less, or in hillside conditions where there is no direct lot frontage, in which case a sidewalk shall be constructed along one side of the street. Some local jurisdictions may require wider sidewalks. The sidewalk may be placed next to the back-of-curb. Where feasible, a parkway strip at least 8- feet wide between the back-of-curb and the street edge of the sidewalk is recommended to provide increased safety and protection of pedestrians and to allow for the planting of trees in accordance with the District's Tree Planting Policy. If no trees are to be planted in the parkway strip, the applicant may submit a request to the District, with justification, to reduce the width of the parkway strip. Detached sidewalks are encouraged and should be parallel to the adjacent roadway. Meandering sidewalks are discouraged. A permanent right-of-way easement shall be provided if public sidewalks are placed outside of the dedicated right-of-way. The easement shall encompass the entire area between the right-of-way line and 2-feet behind the back edge of the sidewalk. Sidewalks shall either be located wholly within the public right-of-way or wholly within an easement. Cul-de-sac Streets Policy: District policy 7207.5.8 requires cul-de-sacs to be constructed to provide a minimum turning radius of 50-feet; in rural areas or for temporary cul-de-sacs the emergency service providers may require a greater radius. Landscape and parking islands may be constructed in turnarounds if a minimum 29-foot street section is constructed around the island. The pavement width shall be sufficient to allow the turning around of a standard AASHTO SU design vehicle without backing. The developer shall provide written approval from the appropriate fire department for this design element. The District will consider alternatives to the standard cul-de-sac turnaround on a case-by-case basis. This will be based on turning area, drainage, maintenance considerations and the written approval of the agency providing emergency fire service for the area where the development is located. Landscape Medians Policy: District policy 7207.5.16 states that landscape medians are permissible where adequate pavement width is provided on each side of the median to accommodate the travel lanes and where the following is provided: • The median is platted as right-of-way owned by ACHD. • The width of an island near an intersection is 12-feet maximum for a minimum distance of 150-feet. Beyond the 150-feet, the island may increase to a maximum width of 30-feet. • At an intersection that is signalized or is to be signalized in the future, the median width shall be reduced to accommodate the necessary turn lane storage and tapers. • The Developer or Homeowners Association shall apply for a license agreement if landscaping is to be placed within these medians. 21 Summerlin West/ MPP24-0009 / H-2024-0023 • The license agreement shall contain the District's requirements of the developer including, but not limited to, a"hold harmless" clause; requirements for maintenance by the developer; liability insurance requirements; and restrictions. • Vertical curbs are required around the perimeter of any raised median. Gutters shall slope away from the curb to prevent ponding. 7. Roadway Offsets Local Street Intersection Spacing on Minor Arterials: District policy 7205.4.3 states that new local streets should not typically intersect arterials. Local streets should typically intersect collectors. If it is necessary, as determined by ACHD, for a local street to intersect an arterial, the minimum allowable offset shall be 660-feet as measured from all other existing roadways as identified in Table 1 a (7205.4.6). Collector Offset Policy: District policy 7206.4.5, states that the preferred spacing for a new local street intersecting a collector roadway to align or offset a minimum of 330-feet from any other street (measured centerline to centerline). Local Offset Policy: District policy 7207.4.2, requires local roadways to align or provide a minimum offset of 125-feet from any other street (measured centerline to centerline). 8. Stub Streets Stub Street Policy: District policy 7206.2.4.3 and 7207.2.4.3 states that stub streets will be required to provide circulation or to provide access to adjoining properties. Stub streets will conform with the requirements described in Section 7206.2.4 and 7207.2.4, except a temporary cul-de-sac will not be required if the stub street has a length no greater than 150-feet. A sign shall be installed at the terminus of the stub street stating that, "THIS IS A DESIGNATED COLLECTOR ROADWAY. THIS STREET WILL BE EXTENDED AND WIDENDED IN THE FUTURE" and "THIS ROAD WILL BE EXTENDED IN THE FUTURE." In addition, stub streets must meet the following conditions: • A stub street shall be designed to slope towards the nearest street intersection within the proposed development and drain surface water towards that intersection; unless an alternative storm drain system is approved by the District. • The District may require appropriate covenants guaranteeing that the stub street will remain free of obstructions. Temporary Dead End Streets Policy: District policy 7206.2.4.4 and 7207.2.4.4 requires that the design and construction for cul-de-sac streets shall apply to temporary dead end streets. The temporary cul-de-sac shall be paved and shall be the dimensional requirements of a standard cul- de-sac. The developer shall grant a temporary turnaround easement to the District for those portions of the cul-de-sac which extend beyond the dedicated street right-of-way. In the instance where a temporary easement extends onto a buildable lot, the entire lot shall be encumbered by the easement and identified on the plat as a non-buildable lot until the street is extended. 9. Driveways 9.1 Internal Local Streets Driveway Location Policy: District policy 7207.4.1 requires driveways near intersections to be located a minimum of 75-feet (measured centerline-to-centerline) from the nearest local street intersection, and 150-feet from the nearest collector or arterial street intersection. Successive Driveways: District Policy 7207.4.1 states that successive driveways away from an intersection shall have no minimum spacing requirements for access points along a local street, but the District does encourage shared access points where appropriate. 22 Summerlin West/ MPP24-0009 / H-2024-0023 Driveway Width Policy: District policy 7207.4.3 states that where vertical curbs are required, residential driveways shall be restricted to a maximum width of 20-feet and may be constructed as curb-cut type driveways. Driveway Paving Policy: Graveled driveways abutting public streets create maintenance problems due to gravel being tracked onto the roadway. In accordance with District policy, 7207.4.3, the applicant should be required to pave the driveway its full width and at least 30-feet into the site beyond the edge of pavement of the roadway. 10. Traffic Calming Speed Control and Traffic Calming Policy: District policy 7207.3.7 states that the design of local street systems should discourage excessive speeds by using passive design elements. If the design or layout of a development is anticipated to necessitate future traffic calming implementation by the District, then the District will require changes to the layout and/or the addition of passive design elements such as horizontal curves, bulb-outs, chokers, etc. The District will also consider texture changes to the roadway surface (i.e. stamped concrete) as a passive design element. These alternative methods may require maintenance and/or license agreement. 11. Tree Planters Tree Planter Policy: Tree Planter Policy: The District's Tree Planter Policy prohibits all trees in planters less than 8-feet in width without the installation of root barriers. Class II trees may be allowed in planters with a minimum width of 8-feet, and Class I and Class III trees may be allowed in planters with a minimum width of 10-feet. 12. Landscaping Landscaping Policy: A license agreement is required for all landscaping proposed within ACHD right-of-way or easement areas. Trees shall be located no closer than 10-feet from all public storm drain facilities. Landscaping should be designed to eliminate site obstructions in the vision triangle at intersections. District Policy 5104.3.1 requires a 40-foot vision triangle and a 3-foot height restriction on all landscaping located at an uncontrolled intersection and a 50-foot offset from stop signs. Landscape plans are required with the submittal of civil plans and must meet all District requirements prior to signature of the final plat and/or approval of the civil plans. 13. Pathway Crossings: United States Access Board R304.5.1.2 Shared Use Paths. In shared use paths, the width of curb ramps runs and blended transitions shall be equal to the width of the shared use path. AASHTO's Guidelines for the Development of Bicycle Facilities 5.3.5 Other Intersection Treatments: The opening of a shared use path at the roadway should be at least the same width as the shared use path itself. If a curb ramp is provided, the ramp should be the full width of the path, not including any flared sides if utilized. . . . Detectable warnings should be placed across the full width of the ramp. FHWA's "Designing Sidewalks and Trails for Access" (1999) reflected common ADA-related concepts: Chapter 6, Page 16-6: The width of the ramp should be at least as wide as the average width of the trail to improve safety for users who will be traveling at various speeds. In addition, the overall width of the trail should be increased, so the curb ramp can be slightly offset to the side. The increased width reduces conflict at the intersection by providing more space for users at the bottom of the ramp. G. Attachments 23 Summerlin West/ MPP24-0009 / H-2024-0023 ENGINrN G,INC. 181 East 50th Street Garden City, ID 83714 (208)841-4996 MEMORANDUM DATE: June 14,2024 TO: Laren Bailey r ZONAL DevCo, LLC C,�eT a e FROM: Chhang Ream,P.E.,PTOE 1 CR Engineering,Inc. 6/14X24 PROJECT: Summerlin Subdivision ' r , OF P Meridian,Idaho N G SUBJECT: Traffic Impact Analysis Introduction and Summary This memorandum summarizes the traffic impact analysis (TIA) for the proposed Summerlin Subdivision located east of Locust Grove Road between Lake Hazel Road and Columbia Road in Meridian, Idaho. Summerlin Subdivision is a proposed residential development containing 338 single-family lots. The development is proposing one site access on Locust Grove Road. The scope of the TIA was based on our coordination with the Ada County Highway District (ACHD). The following sections summarize the proposed development, existing conditions of the study area, traffic forecasts, and traffic impact analysis. The key findings are: ■ The proposed development is estimated to generate 3,094 weekday daily trips, 226 trips in the AM peak hour, and 312 trips in the PM peak hour Approximately 85%of the site traffic is estimated to have origins/destination north of the site and 15% south of the site ■ The proposed site access on Locust Grove is located approximately 700 feet south of Via Roberto Lane • Meets ACHD 660 feet local road spacing on a minor arterial ■ The proposed access and Locust Grove Road intersection is anticipated to warrant a southbound left-turn lane under 2030 build-out year total traffic conditions • Warranted when 100 lots are constructed and occupied generating 100 PM peak hour trips ■ The proposed access and Locust Grove Road intersection is anticipated to meet minimum operational thresholds under 2030 build-out year total traffic conditions with and without the southbound left-turn lane S:Iprojects124-19 Summerlin Subdivision ldoclSummerlin Subdivision TIA.docx Page 1 of 7 Traffic Impact Analysis Summerlin Subdivision June 2024 Meridian, Idaho 1 There is adequate intersection sight distance at the proposed site access intersection • Maintain a minimum intersection sight distance of 555 feet • Building setback and landscape design should not obstruct intersection sight distance ■ All internal local roads with front-on housing are estimated to carry less than 2,000 average daily traffic (ADT), except for a short segment of the access roadway east of Locust Grove Road ■ A short segment of the proposed access roadway east of Locust Grove Road does not have front-on housing and is estimated to carry over 3,000 ADT ■ The proposed access roadway should be functionally classified and constructed as a local road • Does not correspond to any future collector street identified in the Master Street Map ■ The site only has one local road access to the public street system until the mid-mile collector street along the eastern site boundary is constructed between Lake Hazel Road and Columbia Road • Per ACHD Policy Section 7207.3.3,the maximum ADT allowed on one local road access to the public street system is 1,000 • The ADT on the proposed access roadway is anticipated to exceed 1,000 when 100 lots are constructed and occupied ■ Traffic calming measures should be installed on internal local roads with straight segments exceeding 750 feet per ACHD Policy Proposed Development Figure 1 shows the preliminary site plan for the proposed development. Summerlin Subdivision is a proposed residential development containing 338 single-family lots. The expected build-out year is 2030 but this may change depending on the market conditions. The development is proposing one full-movement site access on Locust Grove Road. The development is planning to construct one-half of the future mid-mile collector street along the eastern site boundary. The preliminary site plan also shows two stubbed roads for future connectivity with the adjacent parcels. Existing Conditions Locust Grove Road is a two-lane minor arterial with a posted speed limit of 50 mph. It has a rural section without a curb, gutter, sidewalks, and bicycle lanes along the site frontage. Existing traffic on the Locust Grove Road segment adjacent to the site was collected on June 6, 2024, and is attached. The existing ADT on Locust Grove adjacent to the site is 3,152 vehicles per day. The maximum peak hour directional volume on this Locust Grove Road segment is 284 vehicles per hour(vph),which is less than the 575 vph planning threshold for a two-lane minor arterial. There were no reported crashes on Locust Grove Road along the site frontage between 2019 and 2023. �{E'NGINEE G,INC. Page 2 of 7 Traffic Impact Analysis Summerlin Subdivision June 2024 Meridian, Idaho Figure 1—Preliminary Sitel Plan e division ie�s-lab E � (�n-Raacess Cavaiii-Ln Private - - - - - - - - - - - - I i i I i i Ir, i i i i d i i i 1 i _ I 01 Ili I ' -._ UPI a Traffic Forecasts The analysis year is 2030 corresponding to the expected build-out year of the project. 2030 background traffic on the study area segment of Locust Grove Road is estimated by extrapolating the existing counts with a 7% annual growth rate,which is the same growth rate used in Pinnacle Mixed-Use Development TIS. The 7%annual growth is assumed to account for off-site traffic generated by in-process developments in the area and adjacent to the site. Site trip generation for Summerlin Subdivision is estimated using the procedures recommended in the Trip Generation Manual (I I'Edition), published by the Institute of Transportation Engineers (ITE). At full build-out, the development is estimated to generate 3,094 weekday daily trips, 226 trips during the AM peak hour, and 312 trips during the PM peak hour, as summarized in Table 1. Approximately 15% of the site traffic is estimated to have origins/destinations to the south and 85% to the north. All site traffic is expected to use the proposed access on Locust Grove Road. The mid-mile collector along the eastern site boundary is assumed not connected to Lake �ENGNE H G,INC. Page 3 of 7 Traffic Impact Analysis Summerlin Subdivision June 2024 Meridian, Idaho Hazel Road or Columbia Road. The site traffic is added to the 2030 background traffic to obtain the 2030 build- out year total traffic, summarized in Figure 2. Table 1—Build-Out Site Trip Generation Summary ITE Tota I Land Use Code Size Unit Period Trips Entering Exiting Weekday Daily (vpd) 3,094 50% 1,547 50% 1,547 Single-Family 210 338 DU AM Peak Hour(vph) 226 25% ° Detached Housing 57 75/° 169 PM Peak Hour(vph) 312 63% 197 37% 115 Figure 2—Traffic Summary for Proposed Site Access on Locust Grove Road 2024 Existing 2030 Background Site Traffic 2030 Total 58 87 0 48 87 48 144 144 AM Peak AM Peak AM Peak AM Peak �(— 25 � 25 151 227 0 9 227 9 284 426 0 167 426 167 98 98 PM Peak PM Peak PM Peak PM Peak j- 17 � �j- 17 86 129 0 30 129 30 ENGINEERING,INC. Page 4 of 7 Traffic Impact Analysis Summerlin Subdivision June 2024 Meridian, Idaho Traffic Impact Analysis Site Access, Circulation, and Internal Roadway ADT According to the ACHD Policy Section 7205.4,access spacing on Locust Grove Road,a 50-mph minor arterial, is: • 1,320 feet unsignalized collector street spacing 660 feet local road spacing • 425 feet driveway separation Figure 3 shows the proposed site access and circulation and estimated ADTs on the internal roadway. Summerlin Subdivision only has site frontage on one existing roadway,Locust Grove Road. Therefore, it is necessary to take access to Locust Grove Road. The proposed access on Locust Grove Road is located approximately 700 feet south of Via Roberto Lane, which meets the 660-foot local road spacing. The proposed access is located adjacent to Cavalli Lane,a private road serving one existing home. The proposed access roadway does not correspond to any future collector street identified in the ACED Master Street Map;therefore, should be classified and constructed as a local street. As shown in Figure 3, a short segment of the proposed access roadway east of Locust Grove Road does not have front-on housing and is estimated to carry over 3,000 ADT.All proposed internal roadways with front-on housing are estimated to carry less than 2,000 ADT, except for a short segment of the access roadway east of Locust Grove Road. Per ACED Policy Section 7207.3.3,the maximum ADT allowed on one local road access to the public street system is 1,000. Until the mid-mile collector street along the eastern site boundary is constructed between Lake Hazel Road and Columbia Road,the site only has one local road access to the public street system. The projected traffic volume on the proposed access roadway is anticipated to exceed the 1,000 ADT threshold when 100 lots are constructed and occupied. Three local road segments within Summerlin Subdivision have straight segments exceeding 750 feet. Traffic calming measures should be installed along these roadway segments to reduce potential speeding. Turn Lane Turn lane warrant analysis was conducted for the proposed site access intersection on Locust Grove Road. Turn lane warrant analysis worksheets are attached. Based on ACED turn lane guidelines,a southbound left-turn lane is warranted under 2030 total traffic conditions. The southbound left-turn lane is warranted by 2026 when 100 lots within Summerlin Subdivision are constructed generating 100 PM peak hour trips �ENGINEE G,INC. Page 5 of 7 Traffic Impact Analysis Summerlin Subdivision June 2024 Meridian, Idaho Figure 3-Site Access, Circulation,and ADT Via Roberto Ln L H I Isi E � o V MNN� U 1 ��_ N 700 ' � 3 flT E-Eavalli Ln Priva e, 3094 - es - r - - - - - - - -� 1 944 i 430 500 i Iluu� r. i i 190 900 `o 500 K m m m o y • �� -- � L� � - - - Straight roadway segment exceeds 750' needing traffic calming measure -Future collector street 2,000' 500 ADT Columbia Rd --- Intersection Sight Distance The minimum intersection sight distance on a 50-mph roadway is 550 feet. The proposed site access intersection is estimated to have adequate intersection sight distance. There are no sight obstructions on Locust Grove Road along the site frontage. Building setbacks and landscape design should not obstruct intersection sight distance. Intersection Operations Table 2 summarizes the intersection capacity analysis results. The proposed site access intersection is anticipated to meet ACHD minimum operational thresholds under 2030 build-out year total traffic conditions with and without the southbound left-turn lane. �ENGIIV�EG,INC. Page 6 of 7 Traffic Impact Analysis Summerlin Subdivision June 2024 Meridian, Idaho Table 2—Site Access Intersection Operations—2030 Build-Out Year Peak Hour Total Traffic AM Peak Hour PM Peak Hour Control/Lane Lane Delay We Delay v/c Intersection Site Improvements Group LOS [s/veh] Ratio LOS [s/veh] Ratio �- WBLR B 12 0.26 B 12 0.21 - NBTR - - - - Site Access SBTL A 8 0.04 A 8 0.13 and WBLR B 12 0.26 B 12 0.20 Locust Grove Rd � NBTR - - - - - }� SL A 8 0.04 A 8 0.13 f SBT - - - - �ENGIIV�EG,INC. Page 7 of 7 Traffic Impact Analysis Summerlin Subdivision June 2024 Meridian, Idaho ATTACHMENTS ENGE717V ,INC. Location Locust Grove Rd, Lake Hazel Rd to Columbia Rd Meiridian, Idaho First Period: 0:00 Thursday, June 6, 2024 Last Period: 23:45 Thursday, June 6, 2024 Day Time Direction Total NB SB 0:00 0 5 5 0:15 3 0 3 0:30 1 0 1 0:45 2 1 3 1:00 0 1 1 1:15 0 0 0 1:30 0 2 2 1:45 0 0 0 2:00 0 0 0 2:15 0 0 0 2:30 0 0 0 2:45 0 0 0 3:00 0 0 0 3:15 0 0 0 3:30 0 0 0 3:45 0 0 0 4:00 0 0 0 4:15 0 1 1 4:30 2 0 2 4:45 6 2 8 0 5:00 4 3 7 N 5:15 3 2 5 aa) 5:30 8 5 13 5:45 8 6 14 6:00 12 6 18 coo 6:15 16 7 23 -U) 6:30 26 11 37 6:45 35 4 39 7:00 33 11 44 7:15 39 18 57 7:15 Peak Hour Period Start 7:30 41 10 51 209 Peak Hour Volume 7:45 33 15 48 8:00 38 15 53 151 NB Peak Hour Volume 8:15 37 14 51 58 SIB Peak Hour Volume 8:30 35 16 51 8:45 31 16 47 9:00 22 25 47 9:15 20 18 38 9:30 24 24 48 9:45 17 20 37 10:00 21 20 41 10:15 28 15 43 10:30 26 28 54 10:45 16 29 45 11:00 19 38 57 11:15 20 29 49 11:30 12 22 34 11:45 17 21 38 AM Period 655 460 1115 Total ENGE717V ,INC. Location Locust Grove Rd, Lake Hazel Rd to Columbia Rd Meiridian, Idaho Day Time Direction Total NB SB 12:00 20 25 45 12:15 23 23 46 12:30 24 32 56 12:45 17 33 50 13:00 13 24 37 13:15 20 29 49 13:30 16 29 45 13:45 21 23 44 14:00 19 40 59 14:15 14 49 63 14:30 10 25 35 14:45 15 35 50 15:00 16 25 41 15:15 21 36 57 15:30 23 35 58 15:45 26 61 87 16:00 25 44 69 16:15 18 47 65 16:30 29 56 85 16:30 Peak Hour Period Start 16:45 22 62 84 370 Peak Hour Volume 0 17:00 20 79 99 N 17:15 15 87 102 86 NB Peak Hour Volume Ce 17:30 16 60 76 284 SB Peak Hour Volume m 17:45 19 60 79 18:00 30 38 68 coo 18:15 11 31 42 18:30 14 25 39 18:45 15 41 56 F- 19:00 15 12 27 19:15 11 23 34 19:30 15 27 42 19:45 6 20 26 20:00 10 30 40 20:15 6 25 31 20:30 5 13 18 20:45 7 8 15 21:00 3 13 16 21:15 4 16 20 21:30 1 8 9 21:45 5 6 11 22:00 4 16 20 22:15 0 8 8 22:30 2 7 9 22:45 0 2 2 23:00 0 4 4 23:15 2 7 9 23:30 2 4 6 23:45 2 2 4 PM Period 632 1405 2037 Total Daily Total 1287 1865 3152 Total Vehicles: 3,152 Average Weekday Volume (vpd) 3,152 ENGE717V ,INC. Average AM Peak Hour(vph) 209 NB Average 151 SB Average 58 Average PM Peak Hour(vph) 370 NB Average 86 SB Average 284 �1�GI1N�G, I1NC. Summerlin Subdivision Meridian, Idaho NCHRP 457 Right-Turn Lane Analysis 2030 Total Traffic Right-Turn Major Road Speed Peak Volume Volume Meet Intersection Approach Limit Hour (vph) (vph) Warrant? O Site Access & NB 50 AM 9 236 No Site Grove Rd PM 30 159 No -4- V-3jor-Road speed 40 mch s"0 km.lh 45 mph (70 km/h 100 Add Right-Tun Lane > 50 mloh ( ) a 40 5b mp (90 km► } D> 60 r� 1 (100 m� C 2C0 300 a:_ _-- 60C 700 800 800 1 C "00 _ Major-Road Volume(one direction).vehlh AM Peak PM Peak 1O CR"NGI11�G, INC. Summerlin Subdivision Meridian, Idaho NCHRP 457 Left-Turn Lane Analysis 2030 Total Traffic Speed Advancing Opposing Left-Turn Limit Peak Volume Volume Volume Meet Intersection Approach [mph] Hour [vph] [vph] N Warrant? OSite Access & SB 50 AM 135 236 35.8% No Locust Grove Rd PM 593 159 28.2% YES GCS".. 2�'•4 T$ _ . ft Turn Lane arran e t Q > ___ O C - .N O Q _ 0 Left-Tu n Not IT wa ra 1 1 1=o zoo ao:; 010 Advancing Volume (vph) AM Peak O PM Peak O HCM 6th TWSC 2030 Total 1: Locust Grove Rd & Site Access AM Peak Hour Intersection Int Delay,s/veh 4.3 Movement WBL WBR NBT NBR SBL SBT Lane Configurations Traffic Vol,veh/h 25 144 227 9 48 87 Future Vol,veh/h 25 144 227 9 48 87 Conflicting Peds,#/hr 0 0 0 0 0 0 Sign Control Stop Stop Free Free Free Free RT Channelized - None - None - None Storage Length 0 - - Veh in Median Storage,# 0 0 - 0 Grade, % 0 0 - 0 Peak Hour Factor 90 90 90 90 90 90 Heavy Vehicles, % 2 2 2 2 2 2 Mvmt Flow 28 160 252 10 53 97 Major/Minor Minor1 Major1 Major2 Conflicting Flow All 460 257 0 0 262 0 Stage 1 257 - - - - - Stage 2 203 - - - Critical Hdwy 6.42 6.22 - 4.12 Critical Hdwy Stg 1 5.42 - - - Critical Hdwy Stg 2 5.42 - - - Follow-up Hdwy 3.518 3.318 - 2.218 Pot Cap-1 Maneuver 559 782 - 1302 Stage 1 786 - - - Stage 2 831 - - - Platoon blocked,% - Mov Cap-1 Maneuver 535 782 - 1302 Mov Cap-2 Maneuver 535 - - - Stage 1 786 - - Stage 2 795 - - Approach WB NB SIB HCM Control Delay,s 11.6 0 2.8 HCM LOS B Minor Lane/Major Mvmt NBT NBRWBLn1 SBL SBT Capacity(veh/h) - 732 1302 HCM Lane V/C Ratio - 0.257 0.041 HCM Control Delay(s) - 11.6 7.9 0 HCM Lane LOS - B A A HCM 95th%tile Q(veh) - 1 0.1 - Summerlin Subdivision-Meridian, Idaho Synchro 11 Report Traffic Impact Analysis-June 2024 CR Engineering, Inc. HCM 6th TWSC 2030 Total 1: Locust Grove Rd & Site Access PM Peak Hour Intersection Int Delay,s/veh 3.1 Movement WBL WBR NBT NBR SBL SBT Lane Configurations Traffic Vol,veh/h 17 98 129 30 167 426 Future Vol,veh/h 17 98 129 30 167 426 Conflicting Peds,#/hr 0 0 0 0 0 0 Sign Control Stop Stop Free Free Free Free RT Channelized - None - None - None Storage Length 0 - - Veh in Median Storage,# 0 0 - 0 Grade, % 0 0 - 0 Peak Hour Factor 90 90 90 90 90 90 Heavy Vehicles, % 2 2 2 2 2 2 Mvmt Flow 19 109 143 33 186 473 Major/Minor Minor1 Major1 Major2 Conflicting Flow All 1005 160 0 0 176 0 Stage 1 160 - - - - - Stage 2 845 - - - Critical Hdwy 6.42 6.22 - 4.12 Critical Hdwy Stg 1 5.42 - - - Critical Hdwy Stg 2 5.42 - - - Follow-up Hdwy 3.518 3.318 - 2.218 Pot Cap-1 Maneuver 268 885 - 1400 Stage 1 869 - - - Stage 2 421 - - - Platoon blocked,% - Mov Cap-1 Maneuver 220 885 - 1400 Mov Cap-2 Maneuver 220 - - - Stage 1 869 - - Stage 2 345 - - Approach WB NB SIB HCM Control Delay,s 12.4 0 2.2 HCM LOS B Minor Lane/Major Mvmt NBT NBRWBLn1 SBL SBT Capacity(veh/h) - 612 1400 HCM Lane V/C Ratio - 0.209 0.133 HCM Control Delay(s) - 12.4 8 0 HCM Lane LOS - B A A HCM 95th%tile Q(veh) - 0.8 0.5 - Summerlin Subdivision-Meridian, Idaho Synchro 11 Report Traffic Impact Analysis-June 2024 CR Engineering, Inc. HCM 6th TWSC With Turn Lane 1: Locust Grove Rd & Site Access 2030 Total AM Peak Hour Intersection Int Delay,s/veh 4.3 Movement WBL WBR NBT NBR SBL SBT Lane Configurations + Traffic Vol,veh/h 25 144 227 9 48 87 Future Vol,veh/h 25 144 227 9 48 87 Conflicting Peds,#/hr 0 0 0 0 0 0 Sign Control Stop Stop Free Free Free Free RT Channelized - None - None - None Storage Length 0 - 100 - Veh in Median Storage,# 0 0 - 0 Grade, % 0 0 - 0 Peak Hour Factor 90 90 90 90 90 90 Heavy Vehicles, % 2 2 2 2 2 2 Mvmt Flow 28 160 252 10 53 97 Major/Minor Minor1 Major1 Major2 Conflicting Flow All 460 257 0 0 262 0 Stage 1 257 - - - - - Stage 2 203 - - - Critical Hdwy 6.42 6.22 - 4.12 Critical Hdwy Stg 1 5.42 - - - Critical Hdwy Stg 2 5.42 - - - Follow-up Hdwy 3.518 3.318 - 2.218 Pot Cap-1 Maneuver 559 782 - 1302 Stage 1 786 - - - Stage 2 831 - - - Platoon blocked,% - Mov Cap-1 Maneuver 536 782 - 1302 Mov Cap-2 Maneuver 536 - - - Stage 1 786 - - Stage 2 797 - - Approach WB NB SIB HCM Control Delay,s 11.6 0 2.8 HCM LOS B Minor Lane/Major Mvmt NBT NBRWBLn1 SBL SBT Capacity(veh/h) - 732 1302 HCM Lane V/C Ratio - 0.257 0.041 HCM Control Delay(s) - 11.6 7.9 HCM Lane LOS - B A HCM 95th%tile Q(veh) - 1 0.1 Summerlin Subdivision-Meridian, Idaho Synchro 11 Report Traffic Impact Analysis-June 2024 CR Engineering, Inc. HCM 6th TWSC With Turn Lane 1: Locust Grove Rd & Site Access 2030 Total PM Peak Hour Intersection Int Delay,s/veh 3.1 Movement WBL WBR NBT NBR SBL SBT Lane Configurations + Traffic Vol,veh/h 17 98 129 30 167 426 Future Vol,veh/h 17 98 129 30 167 426 Conflicting Peds,#/hr 0 0 0 0 0 0 Sign Control Stop Stop Free Free Free Free RT Channelized - None - None - None Storage Length 0 - 100 - Veh in Median Storage,# 0 0 - 0 Grade, % 0 0 - 0 Peak Hour Factor 90 90 90 90 90 90 Heavy Vehicles, % 2 2 2 2 2 2 Mvmt Flow 19 109 143 33 186 473 Major/Minor Minor1 Major1 Major2 Conflicting Flow All 1005 160 0 0 176 0 Stage 1 160 - - - - - Stage 2 845 - - - Critical Hdwy 6.42 6.22 - 4.12 Critical Hdwy Stg 1 5.42 - - - Critical Hdwy Stg 2 5.42 - - - Follow-up Hdwy 3.518 3.318 - 2.218 Pot Cap-1 Maneuver 268 885 - 1400 Stage 1 869 - - - Stage 2 421 - - - Platoon blocked,% - Mov Cap-1 Maneuver 232 885 - 1400 Mov Cap-2 Maneuver 232 - - - Stage 1 869 - - Stage 2 365 - - Approach WB NB SIB HCM Control Delay,s 12.2 0 2.2 HCM LOS B Minor Lane/Major Mvmt NBT NBRWBLn1 SBL SBT Capacity(veh/h) - 625 1400 HCM Lane V/C Ratio - 0.204 0.133 HCM Control Delay(s) - 12.2 8 HCM Lane LOS - B A HCM 95th%tile Q(veh) - 0.8 0.5 Summerlin Subdivision-Meridian, Idaho Synchro 11 Report Traffic Impact Analysis-June 2024 CR Engineering, Inc. H. Standard Conditions of Approval 1. All proposed irrigation facilities shall be located outside of the ACHD right-of-way (including all easements). Any existing irrigation facilities shall be relocated outside of the ACHD right-of-way (including all easements). 2. Private Utilities including sewer or water systems are prohibited from being located within the ACHD right-of-way. 3. In accordance with District policy, 7203.3, the applicant may be required to update any existing non- compliant pedestrian improvements abutting the site to meet current Americans with Disabilities Act (ADA), Public Right-of-Way Accessibility Guidelines (PROWAG), ISPWC, or ACHD requirements . The applicant's engineer should provide documentation of compliance to District Development Review staff for review. 4. Replace any existing damaged curb, gutter and sidewalk and any that may be damaged during the construction of the proposed development. Contact Construction Services at 387-6280 (with file number)for details. 5. A license agreement and compliance with the District's Tree Planter policy is required for all landscaping proposed within ACHD right-of-way or easement areas. 6. All utility relocation costs associated with improving street frontages abutting the site shall be borne by the developer. 7. It is the responsibility of the applicant to verify all existing utilities within the right-of-way. The applicant at no cost to ACHD shall repair existing utilities damaged by the applicant. The applicant shall be required to call DIGLINE (1-811-342-1585) at least two full business days prior to breaking ground within ACHD right-of-way. The applicant shall contact ACHD Traffic Operations 387-6190 in the event any ACHD conduits (spare or filled)are compromised during any phase of construction. 8. Utility street cuts in pavement less than five years old are not allowed unless approved in writing by the District. Contact the District's Utility Coordinator at 387-6258 (with file numbers) for details. 9. All design and construction shall be in accordance with the ACHD Policy Manual, ISPWC Standards and approved supplements, Construction Services procedures and all applicable ACHD Standards unless specifically waived herein. An engineer registered in the State of Idaho shall prepare and certify all improvement plans. 10. Construction, use and property development shall be in conformance with all applicable requirements of ACHD prior to District approval for occupancy. 11. No change in the terms and conditions of this approval shall be valid unless they are in writing and signed by the applicant or the applicant's authorized representative and an authorized representative of ACHD. The burden shall be upon the applicant to obtain written confirmation of any change from ACHD. 12. If the site plan or use should change in the future, ACHD Planning Review will review the site plan and may require additional improvements to the transportation system at that time. Any change in the planned use of the property, which is the subject of this application, shall require the applicant to comply with ACHD Policy and Standard Conditions of Approval in place at that time unless a waiver/variance of the requirements or other legal relief is granted by the ACHD Commission. I. Conclusions of Law 1. The proposed site plan is approved, if all of the Site Specific and Standard Conditions of Approval are satisfied. 2. ACHD requirements are intended to assure that the proposed use/development will not place an undue burden on the existing vehicular transportation system within the vicinity impacted by the proposed development. 24 Summerlin West/ MPP24-0009 / H-2024-0023 Request for Appeal of Staff Decision To request an appeal of a staff level decision, see District policy 7101.6.7 at https://www.achdidaho.org/home/showpublisheddocument/452/638243231708370000 Request for Reconsideration of Commission Action To request reconsideration of a Commission Action, see District policy 1006.11 at https://www.achdidaho.org/home/showpublisheddocument/452/638243231708370000 25 Summerlin West/ MPP24-0009 / H-2024-0023