Loading...
HomeMy WebLinkAboutCC - Trip Generation Comparison FSS\0NAL ENc K I TT E LS O N 101 South Capitol Boulevard,Suite 600 � ENSFO Boise, ID 83702 &ASSOCIATES P208.338.2683 �.0 1�/20 TECHNICAL MEMORANDUM vq' SFG.OF \°05P� MARS October 14, 2025 Project#29897 To: Sonya Allen, Bill Parsons, Brian McClure—City of Meridian, ID From: Jamie Markosian, PE, Matthew Hagen — Kittelson &Associates, Inc. CC: Mindy Wallace—Ada County Highway District RE: PINE 43 - Master Plan Update This memorandum presents Kittelson &Associates, Inc.'s (Kittelson) additional and updated analysis for the proposed PINE43 development based on discussions with the City of Meridian and the Ada County Highway District (ACHD) and documents discussions between ACHD and the development team regarding the need for additional traffic analysis associated with the proposed land uses changes for the PINE43 development, located in Meridian, Idaho. Background The PINE43 development is located between Fairview Avenue and Commercial Street, east of Locust Grove Road in Meridian, ID. The development submitted a TIS in 2017 that was accepted by ACHD and the development was subsequently approved by the City of Meridian. Portions of the development have already been constructed.The development has since revised portions of the site plan providing varying land uses in the remaining undeveloped areas. Figure 1 illustrates the site location. The areas that have been developed to date are the parcels north of State Avenue internal to the overall site. The development team is currently proposing an update to the land use and overall plan for the portion of the project that sits south of State Avenue. Attachment A shows a reference map including the overall development and highlights the area proposed for changes, including the land use and size of the proposed versus what was accepted in the 2017 study (originally prepared by Thompson Engineers). The new and original site plan are also located in Attachment A for reference. Kittelson&Associates,Inc. October 14,2025 Page 2 PINE 43-Master Plan Update TECHNICAL MEMORANDUM Figure 1. Project Vicinity -Fairview Ave ■uurn■1■ _��, 113 w � l4� N i 1 N .700 ir �ilanubl� - Grip . State Ave ... .............. % Pine Ave - FY�.�iY,Y�r,■,r1.y T� 1 xA I�L 4, 1 r.■191}Y■I I 10 10T T}.10 10 1.I f I d u r IN Completed Area (2017 Master Plan) Proposed Update Area (2025 Updated Site Plan) Trip Generation Comparison Kittelson prepared a comparison of trip generation between the previously approved land uses in the development south of State Avenue from the approved 2017 TIS and the currently proposed land use changes presented in this memorandum.The following tables highlight the trip generation comparisons between the accepted TIS and the proposed land use updates. Table 1 summarizes the overall comparison of net new trips between the 2017 TIS and the currently proposed updates. Due to the nature of the proposed land uses, there are some unique trip generation changes occurring, primarily related to the development's internal capture of trips between residential, office, and retail uses. Internal capture trips account for traffic that occurs between the different uses within the site (for example, a hotel trip that also visits a retail or restaurant use within the site). As such, Kittelson&Associates,Inc. October 14,2025 Page 3 PINE 43-Master Plan Update TECHNICAL MEMORANDUM although they account for a trip to multiple uses within the site, they only account for one overall vehicle round trip to the site and on the surrounding transportation system. Further the retail component of the project produces increased pass-by trips. Pass-by trips represent trips that are currently traveling on the street adjacent to the site (Pine Avenue) for some other primary purpose (such as a trip from work to home) and stop into the site en-route during their normal travel. As such, pass-by trips do not result in a net increase in traffic on the surrounding transportation system and, typically, their only effect occurs at the site access driveways where they become turning movements. Kittelson followed the Institute of Transportation Engineers (ITE) Trip Generation Manual, 31 Edition procedures for calculating pass-by trips of the proposed land uses.Additionally, pass-by trip percentages were adjusted for the commercial land uses within the site to represent a more reasonable distribution of pass-by trips to the development, given the lack of a typical generator of pass-by trips, such as a supermarket. Internal capture for trips associated with the development were calculated based on NCHRP Report 684: Enhancing Internal Capture procedures. Based on the layout of the site and mix of uses within this layout, internal capture could be calculated in a variety of ways (i.e., closed system/one site vs open system/block-by-block). Particularly, for this site, there is internal capture potential due to the layout and orientation of parking (both on- and off-street) and use type. A conservative approach to calculating internal capture for this site is measured by assessing each quadrant of the Pine Avenue/Webb Way intersection individually, thereby producing a lesser amount of internal capture between land uses for visitors to the development that park in one quadrant of the development and walk to their trip-end/ends in another quadrant of the development. Based on the conservative assumptions for pass-by and internal capture rates described above, the proposed land uses in the PINE 43 update are estimated to generate 130 additional net new vehicles during the AM peak hour and 165 additional net new vehicles in the PM peak hour when compared to the previous 2017 study. This is a relatively minor difference in overall traffic when compared to the current peak hour volumes on Pine Avenue (1,591 PM peak hour two way volume) or Locust Grove Road (1,735 PM Peak two way volume). Traffic on arterial roadways can fluctuate on a daily basis by 10% on average. As such, the difference in trips of the currently proposed site plan to that of the existing approved development is minor and is well within the current daily fluctuations in traffic on the adjacent roadways. In addition, the minor increase in traffic from the current proposed site plan does not change or impact any of the previously approved conditions of approval for the development as it relates to the transportation system. Table 1. Difference of Trips between 2017 Site Plan and 2025 Site Plan Land Use Daily AM Peak Hour PM Peak Hour Trips Total In Out Total In Out Total Net New Trips (2017 Study) 6315 752 587 165 781 209 572 Total Net New Trips (2025 Site Plan) 9916 882 510 372 946 391 555 Net New Trips (Difference) 13601 1 130 j -77 j 207 165 182 j -17 Kittelson&Associates, Inc. October 14,2025 Page 4 PINE 43-Master Plan Update TECHNICAL MEMORANDUM Table 2, below, contains the approved trip generation for the land uses south of State Avenue from the 2017 TIS. Table 2. 2017 ACHD Approved Estimated Trip Generation south of State Avenue (2017 TIS) Land Use ITE Sq. Ft./# of Daily AM Peak Hour PM Peak Hour Code Units Trips Total In Out Total In Out Multifamily Housing 220 251 1672 129 26 103 155 101 54 (Low-Rise) Capture - 33 4 1 3 12 7 5 Non-Capture - 1639 125 25 100 143 94 49 Specialty Retail 826 19,000 851 18 11 7 52 23 29 Capture - 85 6 4 2 10 3 7 Non-Capture - 766 12 7 5 42 20 22 General Office 710 417,000 4600 650 572 78 622 106 516 Capture - 690 35 17 18 26 11 15 Non-Capture - 3910 615 555 60 596 95 501 Total Trips 7123 797 609 188 829 230 599 Total Capture 808 45 22 23 48 21 27 Total Net New Trips 6315 752 587 165 781 209 572 Kittelson&Associates,Inc. October 14,2025 Page 5 PINE 43-Master Plan Update TECHNICAL MEMORANDUM Table 3, below, summarizes the trip generation for new land use plan proposed for the PINE 43 development, south of State Avenue. Table 3.Trip Generation south of State Avenue (2025 Proposed Land Use Changes) Land Use ITE Sq. Ft./# Daily AM Peak Hour PM Peak Hour Code of Units Trips Total In Out Total In Out Multifamily Housing (Mid-Rise) 221 874 4123 373 86 287 341 208 133 Single-Family Attached 215 30 178 10 3 7 14 8 6 Housing Internal - 954 11 2 9 75 51 24 Non-Internal - 3347 372 87 285 280 165 115 Hotel 310 177 1495 81 45 36 103 53 50 Internal - 247 12 0 12 17 13 4 Non-Internal - 1248 69 45 24 86 40 46 Strip Retail Plaza (40k-150k) 821 72,591 4901 126 78 48 377 185 192 Internal - 1144 31 17 14 88 29 59 Non-Internal - 3757 95 61 34 289 156 133 Pass-By(0%AM, 25% PM) - 1170 0 0 0 75 40 35 General Office 710 221,340 2316 332 292 40 321 55 266 Internal - 188 38 27 11 26 10 16 Non-Internal - 2128 294 265 29 295 45 250 Total Trips I 113013 I 922 504 418 1156 509 647 Total Internal Trips 2533 92 46 46 206 103 103 Total Non-Internal Trips 10480 830 458 372 950 406 544 Total Pass By Trips 1170 0 0 0 75 40 35 Total Net New Trips 9310 830 458 372 875 366 509 As previously noted, the mixture of land uses presented in the updated site plan of multifamily residential, vertically integrated buildings (i.e., live-work), neighborhood serving commercial (boutique retail, specialty shops, dining options, etc.), Med-Tech office space etc. offers a substantial opportunity for reduction in overall daily trips associated with the development due to the internal capture of these trips (primarily commuting trips and trips for services such as meals and neighborhood retail) within the development, itself. Kittelson&Associates,Inc. October 14,2025 Page 6 PINE 43-Master Plan Update TECHNICAL MEMORANDUM Multifamily housing, for example, accounts for nearly 5 trips per unit on a daily basis. Given the proximity to employment, goods and services, and entertainment associated with the development, approximately 22% of the daily trips associated with multifamily use will likely be contained within the development as the services for which those trips are being made are available without leaving the site (i.e., approximately 874 trips per day). Other uses noted in the development plan include vertically integrated space or"live- work" space. These uses offer a combination of residential and commercial space which remove commuting trips and offer opportunities for small businesses and neighborhood commercial space that will be supported by the surrounding development. Given the nature of the updates to the PINE 43 development, internal trip capture becomes a major component of the overall trip generation for the development. Places to live, work, shop and socialize are located within a close proximity and offers the realistic opportunity to generate less traffic from external origin points.The uses serve the local residents/employees/visitors (i.e., hotel traffic) and offer ease of accessibility, which means less dependency on vehicle trips.The proposed updates to the PINE 43 development are expected to capture, and retain, approximately 20% of the total traffic generated by the land uses within the development, meaning fewer new vehicles on the transportation network with origin(s) or destination(s) at PINE 43. Traffic Due Diligence Coordination for Next Steps Kittelson met with ACHD staff on February 29, 2024 to review the proposed trip generation and determine the needs for additional traffic analysis and the scope of work for any additional traffic analysis that may be required by the District due to the proposed land use changes.The trip generation comparison information, provided in this memorandum, was shared with ACHD staff prior to that meeting.At that time, the net differences in trip generation were smaller, based on the contemplated land use updates at that time. Table 4 summarizes the overall net new trip differences that were being considered February 2024. Table 4. Proposed Land Use Trip Generation Comparison, February 2024 Land Use Daily AM Peak Hour PM Peak Hour Trips Total In Out Total In Out Total Net New Trips (2017 Study) 6315 752 587 165 781 209 572 Total Net New Trips (2025 Site Plan) 8872 749 358 391 784 357 427 Net New Trips (Difference) 2557 j -3 -229 226 3 148 -145 As shown in the updated land use proposal, the most recent site plan has undergone adjustments to various land use intensity/size and produces a slightly larger difference in net new trips for the portion of PINE43 south of State Avenue. In response to the information presented for the February 29, 2024 meeting, ACHD expressed no need for any additional traffic analysis but made notes on enhancing pedestrian access and connectivity within the site by installing RRFB's at the Pine Avenue/Webb Way roundabout as well as confirming continuity in Kittelson&Associates, Inc. October 14,2025 Page 7 PINE 43-Master Plan Update TECHNICAL MEMORANDUM pedestrian facilities throughout the site, given the intended uses and the nature of the internal trips to the development due to those uses. We trust this memorandum documents the comparison in land uses from the accepted site plan from 2017 and the newly proposed updates for PINE 43, south of State Ave and contains the appropriate information needed to help City staff understand the incremental impacts to the transportation system the updated land use plan has. If you have questions or need additional information, please reach out to me at imarkosian@kittelson.com or by phone at (208)472-9813. Sincerely, KITTELSON &ASS CIATES, INC. Jamie Markosian, PE Senior Engineer Kittelson&Associates, Inc.