HomeMy WebLinkAboutTrilogy Traffic Impact Study
TRILOGY RESIDENTIAL
SUBDIVISION
TRAFFIC IMPACT STUDY
FINAL
Prepared for
Conger Management Group
405 South 8th Street, Suite 290
Boise, Idaho 83702
April 11, 2006
Prepared by
G Washington Group International
Integrated Engi neeri ng, Construction. and Management Sol utions
Washington Group International
720 Park Boulevard, P.O. Box 73
Boise, Idaho 83729-0073
(208) 386-5000
T ABLE OF CONTENTS
EXEC UTIVE SUMMARy............................................................................................................................. ... 1
IN"TRODUCTION........ ................... ............. ....... ...................... ..... .................... ..... ....... ..... ....................................3
PROPOSED DEVELOPME.NT ...... ............. ...... ........ ........ ...o.. ...... ...............o.................. ....... ................ .......................3
STUDY AREA CONDITIONS.... ............. ............................... ... .................... .... ......o....... ............... .....................3
Study Area ...............................................................................................................o...................... . . . . . .. . .. . . . .. .3
Land Use...................................................................................................................................... . .. . .o.... . .. .. . .. . ... . . .. .3
EXISTIN' G CO ND ITI 0 N S .....................................o............................o....................o................o.....o............................. 6
T raffi c V 0 I u m es . . . . .. . . . . . .. . .. . . . .. . . . .. . . .. . . . . . . . . .. .. .. .. . . . .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. . .. . . . .. . . .. . . . . . . .. . . . . .. . .. . . . . . . .. .. . .. . . . .. .. . . . .. . . .. . . .. . .. . .. . 6
Road Sys tern.... . . .. . . . .. ... .. . ... . . . . . . . ... . . . . ... . .. . . . .. .. . ... . .. . . .. .. . .. .... .. .. . .. .. . .... . ..o .. . . . . .... . .. . . .. .... . . .. .. . .. .. . ... . . .... . .. . .. . . .. . ... . .. . . .. . .. ... .. 6
In tersecti ons . .o... . . .. .. .. . .. ... .. .. ... . . .. . .. .. .... ... . .. . .. . . . . . ..o ..... . .. . ... .. . . .... . .... . .. .. . .... . ... ... .. .. . .. ... . .. . .. .. .. .... .. . ... . . .. ..... . .. . .. .... . .o.. ... . . ." . ... . . .. .. . .. . . .. .6
STUD Y PERl 0 D ............................o...................................................................................................................o ...............6
PR OJECfED TRAffIC ..........................o......................................................................................................................... .6
Trip Ge neratio n ......................................................o......................................o.............................................o............... .6
Trip Distribution..................................................................................................................................... ...........8
Background Traffic...... ..... ..o..... .............. ... ... ..... ........ ..... .... ..... .... .... ........ ........ .... ..... ........... .................... ...... ................8
B u il d -Out Traffic........................................................................................................................................ .. . .. .. . .. . . .. . 8
TR.AFFIC ANALYSIS... ..... ..... .................o........ ... ... ..... ........ ........ ......................... .... ..... ....... ...... ...... ....... ....................... .13
Capacity Analysis and Level-of -Service .... .... ........ ................ ..................o.. ............... ........ .........o............. ........ .13
Roadway Capacity... ......... ........ .......o......... .... .... ..............o. ...... ... ..... .....o.. ...............o ..... ............................... .................... .13
Site Access and Circulation .........o......o.......... ............ .... .... ................................ ...... .... .......... ............. ..........o..... ...... .14
Associated Impact Fees.......................... .....-. .............. ........... ..................... ................. ...o........................... ... ... 14
CON CL US ION S ............................................................................................................................................... . . . . . . . . . ... 15
REFERENCES. . . . . . . . . . . . .. . . . .. . . .. . . . . . . . . . . . . . . . . . .. . . .. . . . .. . . . . .. . . . . . . . . .. . .. . . . .. . . . .. . . . . . .. . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . .. . . .. . . . . . . . . . . . . .. . . . . . .. .. 1 7
APPEND IX. ............................................................................................................o............................................. . . . . .. . . . . . .. . . . . . .. .. .L8
G WaShington Group International
Integrated Engineering, Construction. and Management Solutions
Trilogy ANAL TIS
EXECUTIVE SUMMARY
The proposed Trilogy subdivision is a residential development on a 28-acre site south of Chinden Road
and east of Black Cat Road near Meridian, Idaho. The project is expected to contain 146 detached single-
family residential units. The following are the principle conclusions of the analysis for the Trilogy
Development:
1~ The proposed development is projected to generate an average daily traffic (ADT) of 1,397
vehicles of which the p~m. peak hour traffic is 147 vehicles per hour~
2. As a result of the site build-out, traffic on the vicinity roadways is expected to increase. Traffic
on Chinden Road may increase by 310 vehicles per day (vpd) to the east of the site and by 170
vpd to the west of the site. Traffic on Black Cat Road may increase by 20 vpd to the north of the
site and by 910 vpd to the south of the site.
3. The intersection of Black Cat Road and Chinden Road is currently two-way STOP controlled
with traffic on Black Cat Road stopping for traffic on Chinden Road~ For the existing condition~
the lowest level of service for the intersection is LOS D, which relates to the northbound
approach~ For the 2011 Background condition, the intersection is predicted to operate at LOS F,
which relates to the northbound approach~ For the 201 [ Build Out condition, the intersection is
forecast to operate at LOS F. Improvements to the intersection are needed to accommodate
the Build Out traffic volumes.
Retaining the existing two-way STOP control and adding a separate northbound left turn bay was
the selected intersection improvement With the improvement, the Black Cat Road I Chinden
Road intersection is forecast to operate at LOS E for the 2011 Background condition and LOS F
for the 2011 Build Out condition~ but with reduced delays for both conditions.
4~ It is assumed that a temporary 26 ft wide paved approach to the site will be constructed off of
Black Cat Road via Ramblin Court. This site approach on Black Cat Road is forecast to operate at
a LOS A for Build Out conditions. Based on local guidelines, a separate left turn bay and right
turn lane & taper are warranted.
5~ Based on the BuiId..Out traffic forecasts for the roadway network, only Black Cat Road will be
under the COMPASS planning threshold. Roadway capacity improvements to Chinden Road
east and west of Black Cat Road are necessary to accommodate the Build Out volumes, with
respect to the COMPASS planning threshold. ITD is currently performing a corridor study for
Chinden Road in this area.
6. All internal streets with front-an-housing have projected ADT volumes less than 1,000 vehicles
with the following exception: Lots 1-10 of Block 9 have projected ADT volumes greater than
1,000 vehicles.
7. No on street parking should be allowed for internal streets with a width less than 28 ft This
applies to streets E & F and the turn-around at street I~ It also applies to the tum-arounds on each
end of street C.
8. There are various intersection offsets that are less than 150 ft. ACHD policy requires that the
offset of local/residential collector intersections be greater than 150 ft
9. The proposed development is planned for 146 residential lots. Under Ada County guidelines,
growth should be limited to 100 lots until an additional site approach is constructed.
I O~ The project site will generate impact fee revenues of approximately $ 221,482 (Ordinance 200).
\!i Washington Group International
Jntegrated Engineering, Construction, and Management Sofutlons
1
Trilogy ANAL TIS
Following are improvements needed to accommodate the traffic volumes generated by the Trilogy
development:
1. A separate northbound left turn bay at the Black Cat / Chinden Road intersection should be
constructed to accommodate the 2011 Build Out conditions. The existing two-way STOP control
may remain in place. The addition of the northbound left turn bay is an offsite improvement.
2. For the Ramblin Court site approach on Black Cat Road, a southbound left turn-bay and a
northbound right turn lane & taper are warranted on Black Cat Road for vehicles entering the site.
G Washington Group International
Integrated Engineering. Construction. and Management Solutions
2
Trilogy FINAL 11S
INTRODUCTION
Washington Group International (WGI) has been retained to prepare a traffic impact study for the
proposed Trilogy development south of Chinden Road and east of Black Cat Road in Ada County, Idaho.
Figure 1 shows the location of the project and its vicinity. The purpose of this report is to evaluate the
traffic impacts resulting from the proposed development in the vicinity of the project.. This study will
make recommendations for improvements to the transportation system, which will mitigate adverse
impacts of the development This report is prepared in conformance with the requirements of a major
traffic impact study as required by the Ada County Highway District (ACHD). In particular, the scope of
the study includes the following:
· Trip generation of the proposed development;
· Trip distribution and traffic assignment of the site generated traffic;
· Roadway capacity impacts on Chinden Road and Black Cat Road;
· Impacts of site generated traffic at the Chinden RoadIBlack Cat .Road intersection and the
Ramblin Court intersection off of Black Cat Road;
· Recommendations for access to the project;
· Mitigation .measures.
PROPOSED DEVELOPMENT
The Trilogy site is a proposed residential development on a 28-acre parcel. The project is expected to
contain 146 detached single-family residential units. The proposed preliminary site plan for the project is
shown in Figure 2. A copy of the plat is included in the Appendix~ The study assumes the development
will be built by the year 2011.
STUDY AREA CONDITIONS
Study Area
The area of influence will be Ada County. The area of primary impact will be along Chinden Road and
Black Cat Road. For the purpose of this study, it is assumed that a 26 ft wide paved approach to the site
will be constructed off of Black Cat Road and will be offset a minimum distance of 150 ft from the
existing Ramblin Court/Black Cat Road intersection. The intersections considered for impacts are the
Chinden Road/Black Cat Road intersection and the future site access intersection with Black Cat Road~
Land Use
The project area is currently zoned RUT and is expected to be rezoned R-8.
G Washington Group International
Integrated Engjneerlng~ Construction, and Management Solutions
3
Trilogy FINAL TIS
u
HIGHWAY 2
/ 26
0 Cl
<t
<r 0
0 a::::
a:::
I-- w
-'
<( STUDY ~
u :!:
~ AREA
u z
<:( W
....J ?-
m
SCAl. Ei
N. T .5.
.. TE.
JANUARY 2006
tLEI
J/T raffJC/CMC Oe$forvT,t1oqy
"waShington Group International
Integrated Engineering, Construction. and Management Solutions
McMILLAN ROAD
Figure 1
Vicinity Map
CMG: Trifogy Subdivision
""f'
\
J/Tl""sfflc/CJ.lC DlsT ITr-Ua
G Washington Group International
fntegrated Engineering, Constructiont and Management Solutions
o
US HIGHWAY 20 / 26
Cl
<:(
o
Ct:
t-
<(
U
~
U
<(
-..J
CO
LEGEND
= SEE REPORT
ItREFERENCESY
SCALEI
N. T . s.
Figure 2
Proposed Site Map
CMG: Trilogy Subdivision
AlE_
JANUARY 21Z6
IlEt
EXISTING CONDITIONS
Traffic Volumes
Existing ADT and p.m. peak hour turning movement volumes were obtained from traffic counts
perfonned in late 2005. The existing daily and peak hour traffic counts near the site are summarized in
Figure 3.
Road System
The road system in the site vicinity is described below:
· Black Cat Road is a north-south, two-lane facility classified as a minor arterial. The posted
speed limit is 50 mph_
· Chinden Road is an east-west, two-lane facility classified as a principal arterial. The posted
speed limit is 55 mph.
Intersections
The intersection in the site vicinity is described below:
· The intersection of Chinden Road and Black Cat Road is currently two-way STOP controlled
with traffic on Black Cat stopping for traffic on Chinden Road~ There is a left turn bay for
both eastbound and westbound traffic on Chinden Road
STUDY PERIOD
The build out year for this study will be 2011. This date was selected to allow for project approval,
engineering, construction, and full development of the site. Only the weekday p~m. peak hour period was
analyzed for site impacts as this is typically the highest traffic generation period for residential
development Typically the p~m~ peak hour on urban streets occurs between 4:00 p~m. and 6:00 p.m~
PROJECTED TRAFFIC
Trip Generation
Site traffic generation is normally estimated by procedures recommended in the latest edition of the Trip
Generation Manual (7th Ed) published by the Institute of Transportation Engineers (ITE), in the absence
of site-specific data~ Trip rates estimated in the manual are based on actual driveway traffic measurements
performed on different land uses nationwide, particularly in metropolitan areas~
ifIJry.tii"~!(!~lt~~IE~IIgl~I.~~l.
I~~~~r-A'
146
The site trip generation is obtained by
applying the trip rates from the Trip
Generation Manual to each of the uses
of the site development Table 1
represents the summary of the site trip
generation used in this report
Number of Lots
rip Generation Rate
24-hr daily rate
pm peak hour rate
eta) Trips Generated
24-hr daily rate
m ak hour rate
9.57
1~01
1 ,397
147
1,397
147
The proposed development is projected
to generate an average daily traffic
(ADT) of 1,397 vehicles, of which the
p~m~ peak hour traffic (PHT) is 147
vehicles per hour.
G Washington Group International
Integrated Engineering, Constructlon~ and Management Solutions
6
Trilogy FINAL TIS
-ss t I
+,~~.~~~3
~95~ +. t ,.
6 .. N N
--N
US HI HWAY 20 / 26
a
<(
0
a:: Cl
I- <(
0
<:{ 0:::
U
~ lJJ
U -I
<( .........
--1 ~
co
z
W
f-
1
LEGEND
123 = PM PEAK HOUR
J/Trafflc/CMG DOlron/Trrlooy
G Washington Group International
Integrated Engineering, Constructianl and Management SoluUons
I.
N~ T . s.
Figure 3
Existing Traffic Counts
CMG: Trilogy Subdivision
JANUARY 20116
Trip Distribution
Once the generated trips are estimated, they are distributed to geographic origins or destinations and
assigned to particular segments of the encompassed transportation network~ The trip distribution along
the roadway network and turning movement percentages were based on existing traffic movement data
and likely work trip routes~ Traffic generated from the site was distributed 35% to the north and 65 % to
the south along Black Cat Road. The distribution of the site traffic along the roadway network is given in
Figure 4 in the form of percentages of total generated traffic for the site. Figure 5 depicts the forecast
traffic volumes on the internal streets. Figure 6 presents the forecast site traffic on the external network.
Background Traffic
Background (No-Build) traffic volumes for the year 2011 were estimated by applying a growth rate to the
existing traffic volumes~ An annual growth rate of 5% was used for purposes of the background traffic
analysis.
Build-Out Traffic
The site traffic is added to the background traffic to obtain the total build out traffic for the year 2011 ~
The 2011 Build Out traffic volumes are shown in Figure 7
" Washington Group International
rntegrated Engineering, Construction, and Management sorutions
8
Trilogy ANAL TIS
?fi
~
t
12% 11(
~22%
US HI HWAY 20 / 26
~
?fi
~
a
<{
o
a:
t-
<
U
~
U
<t
......J
co
EI
N. T .5.
JANUARY 2006
Figure 4
Site Traffic Distribution
CMG: Trilogy Subdivision
AUI
rLEa
JIT roHlc/Ct.lG DeslQr'llT rhooy %
G Washington Group International
~ntegrated Engineering, Constructron~ and Management SoJutrOtlS
US HIGHWA Y 20 / 26
a
<:(
o
c::
I--
<t
U
~
U
<t
--1
co
.
..~
LEGEND
14561 = DAILY TRAFFIC
SCALE.
N. T ..S.
Figure 5
Internal Site Traffic
CMG: Trilogy Subdivision
lEI
JANUARY 2"06
~LEt
J/TrD1fJc/CUG DssT ITI"'UO
"washington Group International
Integrated Engfnee.rrng, Construet1on_ and Management Solutions
~
LEGEND
J23 = PM PEAK HOUR
14561:: DAILY TRAFFIC
SCALfs
N. T . s.
lE,
J.l.MJARY 2ee&
ILEI
o
o
] J
1.O_~
20 / 26
sl"l
IV')
~~t 19
t ,. .. 35
C1
<;(
o
a::
~
<t
U
~
U
<(
...J
lD
6)6)
1.O
McMILLAN ROAD
-------
"'
J/T r 81 fT efC I.IG Des r ontI r Uooy
"WaShington Group International
Integrated Engi n eeri ng Constructio n fan d Manage ment Sol uti ons
Figure 6
Site Traffic Distribution
CMG: Trilogy Subdivision
"--.J
--5)
20 / 26
CSlrr>
r- fY"')
~~t 19
t ~. 35
Q
<(
o
a::
J0-
e::(
U
~
U
<t
--I
CO
U151
V(D
McMILLAN ROAD
LEGEND
123 = PM PEAK HOUR
/4561 ;:: DAILY TRAFFIC
--------
"'
SC.Il E.
N.. T . S.
Figure 7
Build Out: Peak Hour Traffic
CMG: Trilogy Subdivision
AUt
JANUARY 2e06
J/Traffrc/CUG Des'cn/T.-nooy
G Washington Group International
~ntegrated Englneerin& Construction. and Management Solutions
JlEt
TRAFFIC ANAL VSIS
Capacity Analysis and Level-af-Service
Capacity analysis was performed using the latest edition of Highway Capacity Software (ReS 4.1e) based
on the 2000 edition of the Highway Capacity Manual..
Intersection capacity analysis for the existing, 2011 background, and 2011 build out conditions were
performed. The results of the intersection capacity analysis are summarized in Table 2.
Black Cat I Ch inden Blvd
Black Cat I Chjnden Blvd (improved)
Black Cat Approac h
1~~~~!~~~~6i~~~!;' ~i;;;:;~6~:j~~:~';
2-way stop D 26.8
2-way stop
2-way stop
LOS for Btack Cat I Chinden intersection is for the northbound traffic on Black Cat Road
The intersection of Black Cat Road and Chinden Road is currently two-way STOP controlled with traffic
on Black Cat Road stopping for traffic on Chinden Road~ All legs of the intersection are single lane.
There are separate left turn bays at the intersection for traffic traveling eastbound and westbound on
Chinden Road~ For the existing condition, the intersection is operating at LOS D.. For the 2011
Background condition, the intersection is forecast to operate at LOS F~ For the 2011 Build Out condition,
-the intersection is forecast to operate at LOS F. Improvements to the intersection are needed to
accommodate the Build Out traffic volumes..
Various geometric improvements were analyzed. The approach with the lowest level of service was the
northbound approach. The improvement chosen was an added separate northbound left turn bay for this
approach. The existing two-way STOP control was kept in place. For the 2011 Build Out condition with
the capacity improvement, the intersection is forecast to operate at LOS F, but with a reduced delay.. The
site traffic is approximately 3% of the p.m~ peak hour Build Out volume~ The addition of the northbound
left turn bay is an offsite improvement.
The site approach to Black Cat Road is forecast to operate under capacity at LOS A for the Build Out
condition. A separate southbound left turn bay and a northbound right turn-bay are warranted.
Roadway Capacity
The capacity thresholds determined by CO?vIPASS for the vicinity roadways are as follows:
. A 2-lane arterial road is 15,500 vehicles per day at LOS E (principal Arterial);
. A 2-1ane arterial road is 14,000 vehicles per day at LOS D (Minor Arterial)..
. A 2-lane collector road .is 8,500 vehicles per day at LOS C
Table 3 summarizes the future traffic projections and capacity thresholds on roadways within the vicinity
of the site"
ITD is currently performing a corridor study for Chinden Road in the area of Black Cat Road~ It is
anticipated that Chinden Road will be widened to five Janes because the 2030 COMPASS Model exceeds
~ 13
~ Washington Group International Trilogy ANAL TIS
Integrated Engineering, Construction. and Management Solutions
the COMPASS Threshold volumes for a two lane Chinden Road~ The increased COMPASS threshold for
a widened Chinden Road is used in Table 3.. Based on the Build-Out traffic forecasts for the roadway
network, all roadways are under the COMPASS planning threshold. The site traffic is approximately 3%
of the Build Out volumes.
Table.',. 3.:::.. Exi sting. and..: Fi.1ture::.Traffic; Projectlbn!l"~ on....ViciriitY:. Roadways\~+d~)::X~.+{i}};:/~;"::.::~/:)/~:...U.':<i.';.:'~.:.;);>~:,;:<~::.:..:f.>:.<:..r?.:~:>:.:..:.~.\:):.\..i~:,;::I.:;::.>:.>..::;".'~J:::/;:>:.>:'-:..:..:(::.~y:.'.:.:.'.
Daily Count ACHD 2011 Background Site Traffic 2011 Build 2030 COMPASS
Roadway Location COMPASS
Year Counts Volume'" Volume Out Vo[ume Model Th reshoJd
Ch inden Blvd E. of Black Cat 2004 14.316 20,144 307 20t480 211400 37~OOO
Chinden Blvd w. of Brack Cat 2004 13t569 19 093 168 19$270 24 100 37.000
Black Cat Road N. of Chinden 2002 63 98 14 120 - 8,500
Black Cat Road s. of Chinden 2004 1,478 2.080 908 2,990 51650 14tOOO
* Assumes 50/0 growth rate per year
Site Access and Circulation
All internal streets planned for front-on housing were reviewed and the majority of lots will have
projected daily traffic volumes of 1,000 vpd or less.. The following lots have projected daily traffic
volumes in excess of 1,000 vpd: Lots 1~10 of Block 9.
The Black Cat Road site approach (Ramblin Court) was reviewed for left and right turn-bay treatments
based on locally accepted guidelines. It was determined that this approach warrants a separate left tum-
bay on Black Cat Road. It was also determined that this approach warrants a separate right turn-bay on
Black Cat Road~
The proposed development is planned for 146 residential lots. Under Ada County guidelines, growth
should be limited to 100 lots until an additional site approach is constructed..
All internal street widths were analyzed for parking allowance~ and it was found that streets E & F and the
turn-around at street I are only planned for a 24 ft width.. No on street parking is allowed on streets less
than 28 ft wide~ Also, no on street parking should be allowed for the turn-arounds on each end of street
c.
ACHD policy requires that locaVresidential collector intersections be offset at a distance of 150 ft
minimum. The distance between centerline of street E & F is only 141 ft~ The distance between
centerline of street A & F is only 110 ft The distance between centerline of street G & H is 141 ft.
Appropriate adjustment should be made to meet ACHD policy.
Associated Impact Fees
146
The Trilogy subdivision is expected to
contain 146 detached, single-family
residential un its. As a resu It of this
proposed development, the developer will
incur an impact fee cost of approximately
$221,482 based on current ACHD
guidelines (Ordinance 200)~
Estimation of Impact Fees
Amount
Based Upon Ordinance 200
" Washington Group International
Integrated Engineering, Constructiont and Management Solutions
14
Trilogy ANAL TIS
CONCLUSIONS
The proposed Trilogy subdivision is a residential development on a 28-acre site south of Chinden Road
and east of Black Cat Road near Meridian, Idaho~ The project is expected to contain 146 detached single-
family residential units~ The following are the principle conclusions of the analysis for the Trilogy
Development:
· The proposed development is projected to generate an average daily traffic (ADT) of 1,397
vehicles of which the p~m~ peak hour traffic is 147 vehicles per hour.
· As a result of the site build-out, traffic on the vicinity roadways is expected to increase~ Traffic
on Chinden Road may increase by 310 vehicles per day (vpd) to the east of the site and by 170
vpd to the west of the site. Traffic on Black Cat Road may increase by 20 vpd to the north of the
site and by 910 vpd to the south of the site.
· The intersection of Black Cat Road and Chinden Road is currently two--way STOP controlled
with traffic on Black Cat Road stopping for traffic on Chinden Road. For the existing condition,
the lowest level of service for the intersection is LOS 0, which relates to the northbound
approach. For the 2011 Background condition, the intersection is predicted to operate at LOS F,
which also relates to the northbound approach. For the 2011 Build Out condition, the intersection
is forecast to operate at LOS F. Improvements to the intersection are needed to accommodate
the Build Out traffic volumes.
Retaining the existing two-way STOP control and adding a separate northbound left turn bay was
the selected intersection improvement With the improvement, the Black Cat Road and Chinden
Road intersection is forecast to operate at LOS E for the 2011 Background condition and LOS F
for the 2011 Build Out condition, but with reduced delays for both conditions.
· It is assumed that a temporary 26 ft wide paved approach to the site will be constructed off of
Black Cat Road via Ramblin Court~ This site approach on Black Cat Road is forecast to operate at
a LOS A for Build Out conditions. Based on local guidelines, a separate left turn bay and right
turn lane & taper are warranted.
· Based on the Build-Out traffic forecasts for the roadway network, only Black Cat Road will be
under the COMPASS planning threshold~ Roadway capacity improvements to Chinden Road
east and west of Black Cat Road are necessary to accommodate the Build Out volumes, with
respect to the COMPASS planning threshold. ITD is currently perlorming a corridor study for
Chinden Road in this area~
· All internal streets with front-on-housing have projected ADT volumes less than 1,000 vehicles
witht the following exception: Lots 1-10 of Block 9 have projected ADT volumes greater than
1,000 vehicles.
· No on street parking should be allowed for internal streets with a width less than 28 ft This
applies to streets E & F and the turn-around at street I It also applies to the tum-arounds on each
end of street C.
· There are various intersection offsets that are less than 150 ft ACHD policy requires that the
offset of locaUresidential collector intersections be greater than 150 ft
· The proposed development is planned for 146 residential lots. Under Ada County guidelines,
growth should be limited to .100 lots until an additional site approach is constructed.
· The project site will generate impact fee revenues of approximately $ 221,482 (Ordinance 200).
"WaShington Group International
Integrated Engineering, Constructfon, and Management Solutions
15
Trilogy ANAL TIS
Following are improvements needed to accommodate the traffic volumes generated by the Trilogy
development:
· A separate northbound left turn-bay at the Black Cat I Chinden Road intersection should be
constructed to accommodate the 2011 Build Out conditions~ The existing two-way STOP control
may remain in place. The addition of the northbound left turn bay is an offsite improvement
· For the Ramblin Courtsite approach on B lack Cat Road, a southbound left turn-bay and a
northbound right turn lane and taper are warranted on Black Cat Road for vehicles entering the
site.
" Washington Group International
Integrated Engi nearing, Constructiont and Management Solutions
16
Trilogy ANAL TIS
REFERENCES
HTrip Generation 7th Edition," by Institute of Transportation Engineers, Washington D.C., 2003.
"Highway Capacity Manual 2000,'~ Transportation Research Board, Washington D.C.
ttDevelopment Policy Manual,u Ada County Highway District, July 1994.
Traffic Counts from ACHD website~
COMPASS 2030 model
" Washington Group International
Integrated Engineering, Construction. and Management Solutions
17
Trilogy FINAL TIS
APPENDIX
"WaShington Group International
rntegrated Engineeringt Constructiont and Management Solutions
18
Trilogy ANAL TIS
~,~ ~ ~ ~ ~ ~ i i
i i; ~ ~ ";~lli: A~ i ~ " ;=! , ~ ' s ~ i ~ ~ ~ !
:~: ~ ~ nidi! i~~ l); ; ~ ~ i ~ ~~ ~ ~ ~ 1 ::;i!;;~~ h~~~ ~;~~~~
~! i~ it: ~ ~~~;!l .;i :~~~~~~~~~ ~! : I g i i : i · ~: :1':: ~ !~;~i fL!~;
~! A~! ~~; i !~i!i: ~!: i~~~~i~i~~ ~ [ J J j ~ II ~! I~ I ~I;~~ ~!~~. ~ i :~S=
'1:'11 . ~! ~i ~innd ~i;ljl~ !:nj........ ~: :i:h H~~! ~i ~i
[ L 06.IUU '.It 'Z~ 9Z00s Q., ! ~ ..., .... rl "k Q". t q 14.1
1 .. ~...., f ~&_ ~~:-~__ ~
I ! t~! J..sfC:="'t.:4~ ,-.t7~:,. JJl~ !"'~1O'II~tc ~~~'" T~~~oJ~_ :Ym;lIoI ~T,!III~~~~.~ ;;:' ~:Io"1 ~9t
, t l ~~ ~.~ J? O{ I : r I '''t@J ~ : ~ ~---L : I ~ ~"'- ~ l::::: J e - -~ ~1l~
t r - I' ;;, i 1 t I i I 1-. I ., ,J I ~l 'i l!! t . f 1 i! .......... i ~ ~ i !.I 'i ~t 'i 'Ill I'" t 1- i-~ t "ti I .J I: ~ I ~ I ~~ i ~ 11-
~ ' ' oj; ~/l @~.I @~ d @! ~ @!;I@ir51 ! ~t @! ~ @: ~ @~ !I @! ~ 0! r @! ~ @! ~ @l;:ll 1 lI@a F,l.:)li ~0; r@, ~@~ r0! ~@= itr- -0- -:.;tlL -.- -~ ~j
j \ I 11-, ; c., /.I~ ;! ;1 ~ I :.. I f 1 ~ I I ~ · ~ f I oJ ~ I . ..~ :. I : :" 1 t; "" I<"" 1(1" ~~~ ~
. I r t ,r-Tl F l~ I I I l I I I I I f ~ t ,I ~ , It\._ I ~ I ' I , ~ . 1- ~:.-- - -11~. _ _ _ ~
I .~, J! - 1- t I 1 ~.." c.r~. -- " _:10'" ..,.... .:w~ ~~. 1'000 ,. fJfI~ -'Il~ .tJ 0 llj ..;
j~ ~~ f~' [ l I .' _ ~l ~ ~ Io"'m il ~ .~
-- I :'i~1f ~ -. · . ?<.e':'.:.~lr~ i
! ~: . w~// : II - - -:H'UT""l:r jff j. ~
' l0 --":'j! i
f'.',! 1'::,:.:~ :l: n :r~--@-: ~_-_ta"'II_--_., i B::-=-;-']~ ~
.1.. . " -- ---n~-,-~~
I ;..:.;. f~.i . .:... l~ I"i' -~ ..! .. 0 _ ~ : lJr ~
t, irA ~ ....~----..._.,L-In.
. l !,.., l{"A.>" ~..., J t' /
'! I;: r. ': -~':""-. . 0i~ ..: e _.J, ~;~"
1- ..~:~ ~ : !.~ @ .~\~ ..~ ~;;.~~L"' _
L " .. I l- - - ""m-:-.-- 3..g~ ,a.ooN
U\ ! ;l @ "'~'" ~~~
J; ~ I, I r--~7-- i''\.~
. ir l ,l @ -~ ,l I
; l. i:. f ~':--""''--- "I, ~
d', , l@--.~ ~I
L I , r 11---=--- ; ii I,
i~.t : ~I.. . L-.~
\! ;:: : Ii' @ -- I 1
Y:I::.',-~ij~ ~:;:~~ . ,II ..
r :-(-1 r~~:~.~!
t ~.I' t ~.l :~J ~-__~t!I____
~ j ~ I ;.~~ l~!f:. @ ~ftCT ~
5: J ~r.. : lrs---:!m---~
j ~I;. : ~ ..t @ - ott't -; "f
~,'. J~'" ~
~ ~ ~ ~. t t,) j~---:':l:--- III
~ ~ t ~ I:;, r : ,~. > t;\ i!. 0
!'""'\ 1. f. ' 1 Q !l{~--CO\\R ~.. ~ d~
. ~ 1 [:.1; - . ; ~ :~--~~,~\~ I CZI
--. ~ t !; I II ~ a\ ..... ___ ,IF
~ i ~I; ; : II' "" " U"'ID~--r--""---
u .~~~f~ . I.. ii--~--' ll'- <2) lo"'I otr. ~l @ ..- nn,~ ~
. ~ d~ f';;\ ---.u~--- ---.n~--~
.;~ ,:. I' b ~ ~ toM ~ .,~ _ @ ~. wrr~ .~:I!, @1oM ern ~ ~ ,
"~ I,:',: Ill. . '.1 .. ,: II. -. 'l:L. --~,- - = - 0 I , J. ~~.
j; ---~~--~T---n~--- ~
f-.~lr ; ~ !r~.~ ....~'t ..} ~ 0 -l~ ;~ @ ~<<n --~I'~_;I.j..~.~!lf.~.., fl .. t
I l~__"..,___~_:_,,",__~'. ,.' _ .
\: i t~-@::~, l- e ~..,. ~'@ <.-."; ".8! '11. '~ ' I ;
(",; [!:---.....-~- .~0":.-=-f@":~.~.~1 · _~~,~~.:.~.~.!.~.i~ ~!-~~7--':-
;/.- I ~~ @ -~ ., ---""'----11----,,...,--- ,it. ,_- .-
~ f;.,; :.: -,. ..t(:. [.~I--~_-~. :- e - -- ~u @ ~ nfi' J- e I .l ~r It i ;
. t ---J;~---"'fr---IfI5r.--- " :. t ,.........8 ~ : /..
1 i.l.'..~ " II '~'1~ @ -~., "'.. 1- e l,M'~.~ ~~ t;\ ... IU-'.~ 'F; Y
. (I \:.I - ~ "'W'~, - -;.I':!r: / .1 /,.~
l : f ': 1 lr---~--- .. ---n.~---J---.r.Q',-- - r /' ~
.J,;" ~ : ~~ @ .....~~ ot 1- 8 ~nn no, @ _MO..~ a- 0: ~ ~ ' ,.<,/
I ',. J Ii . ---;lI;:'I- ---ft---rur.--- ~, ~ ,./ j
. I I L !it ~ ~ :.~:/ / >
I h.,,^:l.J.... :..o~'.~, ::ll! ~j:,(_@_J ::7""~~ :.. J ~ 5~,,;.": -~- ~,,;_,:~.l - - ~~: 1~~ !.~:,:/,; r:/'
.' '~...~ ~ ~ " ~;.. (~) w:'~ ~ ~ @n': He.' i = - 0! ~. .~';~ ~ .;
t t : I~ i I ~ ~ 0 ~ .~,_'t ~ ~:-0~~:~~t~~- - -- - ~ .~ f
. j .~ ~ : !~-_.!:!L.-.~~ . -. b_--"1In:'i~-~"I' r ;.'I..~+' ~
,. r ... l t ~t t":t*,-'} " ~. ~
: (>:;~t~, Ii i . - ":' i · I '.' .. . l' ~,~ .' J J:I .
I ',... /~.. i:::: 104 '.1 $. - I ' I · I ~ t 1 t -0---;'::';;~:~ :~;QII
L.: - ~ .'H~ ,~ 1 S: \ d 1 ~ ,J .... i , JI~ . \ --~ "; . 1 Il
I, t..... . ., t . ~::l0~ 10 ~ f8! tl0! Wo0 ~ FBI 'is; rl~ . _ .,jk' ~l
/~.,~~.~.':tJ.~Ji~~l~d~~_kL~~;.~- -
., : ..: ; ~ II. -
: ~ .. III
: .~ ~. .: I
, ., ~ ~
'l~ll"Il'_ .M_"1'. .........~ . &JNo1Ij-' . ~
~~~..
~~~ twII ~~'1:l';)tj
~t1I..l:m~~
9l1.:.t~ro.l~ .g \i'''PI ."'~IOU
lS ~lir....O .S at rl:
,
~ ~"':!Ii ~u ~'f'J
~OIW/I'!} . J.. 'l'C . ~~~
~.Jlof":1~C.,"",,=,"
~ :..li ~J;.mf1~
:~,,:} ~s~,
~ .,I,R '~l.!....~
----as-- .... 6 a3l',~ SJG'
B
I ] t
a ~ --2
----z-~-~~ I ~:
I o-~
rl lrfoN t :::~, c.~
.L \l1d A~'VNfVV/13~cI
NOISlJ\lGenS ^€JOjJ~l
311 :.LN3Wd01:J1\3G BZO
r-.. .. .~.n\
iJ' i .-1 ~ i.
r ~~ r' ~ 1.1
r .I:;>~~. ~{-+ t, t f . (.~ f I
I.. I fU.. i
:-.~~~::'---=/~~--~--'-::.""7~~a~ -iv~.
!
~~.~~ i
: :. t I
>:1
,;.;... )
}f:5 y."'[ a: . ::'t
~:
~R
..:~
.d did ~ ~l
~~~~r;;; ~!:;G ~IJ-~ ~l~g
1~ia~ :Ill i3i~O't~~~t't
~ ~ i ! ~ ! ~ ~ I~ ~ i q ~ ~ i I ~ j i
Ilil II il h ~~III~~~~ ~
a II ! :
~ 0<0.1' I :0 ~ i'1 ! i
::J l I
. t
[
~ '<I '
..: 1 t-..~ .~
1= 1 f .;1 ~ ~
- r j,. 0
:2: l .. .'.;--:4 LiJ
- '01." !' . t ::>
~ i rp.~
to.
t.,; ·
"j~
I .!
I ..; ~
ll~ !
~ J
~ ~ ~; ~ r-r..
s l~ '
I ~il
I t--,
I . I~ .:
. ~L.I '
, ... .
l
. . ,
+-.. _.~. ,- )
'g jf I
... ~~ 1
~!
~
~
.} "'.5t:A
.2{~ :::.: ~
,W ~~
I
en.
.... i
+ ~ r.
z
o
~
U)
u~
:j>
~ l--t
~O
tiJQ:1
2~
~~
QU)
Gi~
;;;0
[jO
....J
~
0::
~
---.:::::
~~
h::~
o ~
~::=i
E;::c.ri
~
I:- :-
3!::t.::l
~~~
E;;
~;:
- ~.
QN
~~
~G
Q~
+.:Jtr.:
G~
::l::O
c:..:-z
-0:;.....
=0
~::::
~s
t-:
~?-=
Q~
~R
- .......
7\l-~,..Ii l ~~~ '~f"I",. ~ . ~ ...,~ l 'i_~"'.3J' ..'~ ~ ~ , ~.j;;...~:;,! .;0:(1- ~".1o .~-.l'S~$ , ;~.('.,l: . ~ ~:~,
Two-Way Stop Control
Page 1 of 2
TWO-WAY STOP CONTROL SUMMARY
General Information Site Information
~naJyst E. Medina I nte rsecti on Black Cat Rd. / Chinden
~gency/Co. Washington Group Int Blvd
J u risd ictio n lACHD
Date Performed 1/20/2006
^nalysis Year 2005 Existing
~naJysis Time Period PM Peak Hour
Pro j ect Descriptio n Trilogy Residential Subdivision
EasUWest Street: Chinden Blvd North/South Street: Black Cat Rd.
Intersection Orientation: East-West Study Period (hrs): 0.25
Vehicle Volumes and Adjustments
Major Street Eastbound Westbound
Movement 1 2 3 4 5 6
L T R L T R
Volume (veh/h) 0 495 6 49 783 1
Peak-hour factor, PHF 0.92 0.92 0.92 0.92 0.92 0.92
Hourly Flow Rate 0 538 6 53 851 1
:(veh/h)
Proportion of heavy 2 2
vehicles, PHV -- -... -- --
Median type Undivided
RT Channelized? 0 0
Lanes 1 1 0 1 .1 ,. 0
Confi 9 u rati on L TR L TR
Upstream Signal 0 0
Minor Street Northbound Southbound
Movement 7 8 9 10 11 12
L T R L .T R
Volume (veh/h) . 12 1 22 0 0 1
Peak-hour factor, PHF 0.92 0.92 0.92 0.92 0.92 0.92
Hourly Flow Rate 13 1 23 0 0 1
(veh/h)
Proportion of heavy 0 0 0 0 0 0
~ehicles, PHV
Percent grade (0/0) 0 0
Flared approach N N
Storage 0 0
RT Channelized? 0 0
Lanes 0 1 0 0 1 0
Config uration LTR LTR
Control Delay, Queue Length, Level of Service
lApproach EB WB Northbound Southbound
Movement 1 4 7 8 9 10 11 12
Lane Configuration L L LTR LTR
VolumeJ v (vph) 0 53 37 1
Capacity, em (vph) 787 1025 202 362
~ Ie ratio 0.00 0.05 0.18 0.00
Queue length (950/0) 0.00 Ow 16 0.65 0.01
fi le:/ Ie: \Documents %20and % 20Setti ngs\medieOO 1 \Local % 20Setti ngs\ Temp\u2k6A. tmp
1/23/2006
Two-Way Stop Control
Page 2 of 2
9.6
A
8.7
A
26~8
D
15.0
B
HCS2000™
Copyright @ 2003 U ni versity of Florida~ AU Rights Reserved
Version 4. I d
fi le:IIC: \Documents% 20and% 20Settings\medieOO 1 \Local % 20Setti ngs\ T emp\u2k6A. tmp
1/23/2006
Two-Way Stop Control
Page 1 of 2
TWO*-W A Y STOP CONTROL SUMMARY
General Information Site Information
J\n a Iyst E~ Medina Intersection Black Cat Rd. / Chinden
~gency/Co. Washington Group Int Blvd
J u risdicti 0 n ACHD
Date Performed 1/20/2006
^,nafys is Year 2011 Background
~narysis Time Period PM Peak Hour
Proj ect Descri pti 0 n Trilogy Residential Subdivision
EastJWest Street: Chinden Blvd North/South Street Black Cat Rd.
Intersection Orientatjon: East-West 81 udy Pe riod (h rs): 0.25
Vehicle Volumes and Adjustments
Major Street Eastbound Westbound
Movement 1 2 3 4 5 6
L T R L T R
Volume (veh/h) 0 632 8 63 999 1
Peak-hour factor, PHF 0.92 O~92 0.92 O~92 0.92 0.92
Hourly Flow Rate 0 686 8 68 1085 1
[(veh/h)
Proportion of heavy 2 2
vehicles, P HV -- -- -- --
Median type Undivided
RT Channelized? 0 0
Lanes 1 1 0 1 1 0
Confi 9 u rati on L TR L TR
Upstream Signal 0 0
Minor Street Northbound Southbound
Movement 7 8 9 10 1.1 12
L T R L .T R
~ofume (veh/h) 15 1 28 0 0 1
Peak-hour factor, PHF 0~92 0.92 0..92 0.92 0.92 0.92
Hourly Flow Rate 16 1 30 0 0 1
'veh/h)
Proportion of heavy 0 0 0 0 0 0
vehicles, PHV
Percent grade (0/0) 0 0
Flared approach N N
Storage 0 0
RT Channelized? 0 0
Lanes 0 1 0 0 1 0
Configuration LTR LTR
Control Delay, Queue Length, Level of Service
~pproach EB WB Northbound Southbound
Movement 1 4 7 8 9 10 11 12
Lane Configuration L L LTR LTR
Volume, v (vph) 0 68 47 1
Capacity, em (vph) 642 901 115 265
v Ie ratio 0.00 O~OB 0.41 O~OO
Queue length (950/0) 0.00 0.24 1.72 0.01
fi le:/ Ie: \Documen ts % 20and % 20Settings\medieOO 1 \Local % 20Settings\Temp\u2k73. tmp
1/23/2006
Two- W ay Stop Control
HCS2000™
10.6
B
9.3
A
56.4
F
Copyright @ :2003 University of Florida. AJ] Rights Reserved
file :/IC: \Documents %20and % 20Settings \medieOO 1 \Local % 20Settings\ T emp\u2k73. tmp
Page 2 of2
18.6
C
Version 4. I d
1/23/2006
Two-Way Stop Control
Page 1 of 2
TWQ-W A Y STOP CONTROL SUMMARY
General Information Site Information
Analyst E~ Medina I nte rsection Bla.ck Cat Rd~ / Chinden
Agency/Co. Washington Group Int.. Blvd
J u risd icti on lACHD
Date Perlormed 1/20/2006
Analysis Year 12011 Buildout
Analvsis Time Period PM Peak Hour
Project Description Tri/o.ClV Residential Subdivision
East/West Street: Chinden Blvd North/South Street: Black Cat Rd"
Intersection Orientation: East-West IStudv Pe riod (h rs): 0.25
Wehicle Volumes and Adjustments
Major Street Eastbound Westbound
Movement 1 2 3 4 5 6
L T R L T R
Volume (veh/h) 0 632 19 84 999 1
Peak..hour factor, PHF 0.92 0.92 0.92 0.92 0>>92 Ow 92
Hourly Flow Rate 0 686 20 91 1085 1
I(vehlh )
Proportion of heavy 2 2
~ehicles, P HV -- ...... -- --
Median type Undivided
RT Channelized? 0 0
Lanes 1 1 0 - 1 1 0
Configu rati on L TR L TR
Upstream SiQnal 0 0
Minor Street Northbound Southbound
Movement 7 8 9 10 11 12
L T R L T R
Volume (veh/h) 21 2 40 0 1 1
Peak..hour factor, PHF 0,,92 O~92 0.92 0,,92 0.92 0.92
Hourly Flow Rate 22 2 43 0 1 1
(veh/h)
Proportion of heavy 0 0 0 0 0 0
vehicles, PHV
Percent grade (0/0) 0 0
Flared approach N N
Storage 0 0
RT Channelized? 0 0
Lanes 0 1 0 0 1 0
Config u ration LTR LTR
Control Delay, Queue Lenath. Level of Service
Approach EB WB Northbound Southbound
Movement 1 4 7 8 9 10 11 12
Lane Configuration L L LTR LTR
lVolumeJ v (vph) 0 91 67 2
Capacity, em (vph) 642 892 106 94
~/c ratio 0,,00 0.10 0.63 0.02
Queue length (950/0) 0.00 0.34 3.14 O~O6
fi 1 p ./Ir. \ nnr'-111"l'1pn tc! ~ i') n ~'" rl Ol-.. "')11 ~ .o.tt~.., ~C1 \ m o.r1; o{)(\ 1 \ T __.... 101_" n "_4-4--': _ _,.. \ ry'l_~ _ \ ~ ~ rt 1_'""7 f .L _ _ _ _
.. Irt." I,..,., r\. f"\. ,.
Two-Way Stop Control
HCS2000™
10.6
B
9~5
A
84,,7
F
44,,1
E
Copyright @ 2003 University of Floridat All Rights Reserved
+~ 1 ,..., ~ 11'-'. \ T"'\ _ .....n--. ...._...."'" (]fJl{'\.... _ .J 171_ ,.., f'\ C' _4...: _ __ \ ~ _ ...J: _'"'A 1 \ T _ _ _ 1 fT1 I""tI ACt _.1-.4-.'= _ _ _ \ JTt _ __ _ __ \ n ....U _""".r' Lu__
Page 2 of2
Version 4.1d
.. 11"\.... /"" n. ^ r
Two-Way Stop Control
Page 1 of 2
TWO..WAY STOP CONTROL SUMMARY
General Information Site Information
I nte rsectj on Black Cat Rd~ / Chinden
Anafyst E~ Medina Blvd
J u risd icti 0 n ACHD
~gency/Co. Washington Group Int
2011 Background
Date Performed 1/20/2006 Analysis Year : (Impro ve d)
Analysts Time Period PM Peak Hour
Trilogy Residential
Project I D Subdivision
EastIWest Street: Chinden Blvd North/South Street: Black Cat Rd~
I nte rs ecU 0 n Orientation: East-West Study Period (hrs): O~25
Vehicle Volumes and Adjustments
Major Street Eastbound Westbound
Movement 1 2 3 4 5 6
L T R L T R
Volume 0 632 8 63 999 1
Peak-Hour Factor, PHF 0.92 O~92 O~92 Ow 92 0.92 O~92
Hourty Flow Rate, HFR 0 686 8 68 1085 1
Percent Heavy Vehicles 2 -- -- 2 ...- --
Median Type Undivided
RT Channelized 0 0
Lanes 1 1 0 1 1 0
Config u ration L TR L "TR
Upstream Signal 0 0
Minor Street Northbound Southbound . ,
Movement .7 8 9 10 1-1 12
L T R L ..T R
Volume 15 1 28 0 0,: 1
Peak-Hour FactorJ PH F 0.92 0.92 0.92 0.92 0.92 0.92
Hourly Flow Rate, HFR 16 1 30 0 0 1
Percent Heavy Vehicles 0 0 0 0 0 0
Percent Grade (0/0) 0 0
Flared Approach N N
Storage 0 0
RT Channelized 0 0
Lanes 1 1 0 0 1 0
Config u ration L TR LTR
Delay, Queue Length, and Level of Service
Approach EB WB Northbound Southbound
Movement 1 4 7 8 9 10 11 12
Lane Configuration L L L TR LTR
~ (vph) 0 68 16 31 1
C (m) (vph) 642 901 49 376 265
~/c 0.00 0.08 0.33 O~O8 O~OO
95010 queue length 0.00 0.24 1.14 0.27 0.01
Control Delay 10~6 9.3 110~7 15.4 18~6
LOS B A F C C
Approach Delay -- ....... 47~9 18~6
fi Ie ://C: \Documen ts % 20and%20Setti ngs\medieOO 1 \Local % 20Settings\ Temp\u2k 149 ~ tmp
1/25/2006
Two-Way Stop Control
J,A,eproach LOS
HCS2000™
E
Page 2 of 2
c
Version 4.1
Copyright <9 2000 University of Floridat All Rights Reserved
fi le://C: \Documen ts %20and%20Setti ngs\medieOO 1 \Local % 20Setti ngs\ Temp\u2k 149. tmp
1/25/2006
Two-Way Stop Control
Page 1 of 2
TWO-WAY STOP CONTROL SUMMARY
General Information Site Information
I nte rsecti on Black Cat Rd. / Chinden
~na]yst E. Medina Blvd
~gency/Co. Washington Group Int. U u risdiction IACHD
Date Performed 1/20/2006 lAnalys is Yea r 2011 Buildout (Improved)
!Ana~ysis Time Period PM Peak Hour Proj ect f D Trilogy Residential
Subdivision
East/West Street: Chinden Blvd No rth/S 0 uth Street: Black Cat Rd.
I nte rsection 0 rientati on: East-West Study Period (hrs): O~25
Vehicle Volumes and Adjustments
Major Street Eastbound Westbound
Movement 1 2 3 4 5 6
L T R L T R
Volume 0 632 19 84 999 1
Peak-Hour Factor, PHF 0,,92 0.92 O~92 O~92 0.92 O~92
Hourly Flow Rate, HFR 0 686 20 91 1085 1
Percent Heavy Vehicles 2 -- -- 2 -- --
Median Type Undivided
RT Channelized 0 0
Lanes 1 1 0 1 1 0
Confi 9 u ra ticn L TR L .. , TR
. .
Upstream Signal 0 o f~... , ..
Minor Street Northbound Southbound
Movement 7 8 9 10 1"l . . 12
L T R L T R
Volume 21 2 40 0 1/ / 1
Peak...Hour Factor, PH F O~92 0..92 0,,92 0.92 0.92 . , ' 0.92
Hourly Flow Rate, HFR 22 2 43 0 1 1
Percent Heavy Vehicles 0 0 0 0 0 0
Percent Grade (0/0) 0 ! 0
Flared Approach N N
Storage 0 0
RT Channelized 0 0
Lanes 1 1 0 0 1 0
Configuration L TR LTR
Delay, Queue Length and Level of Service
Approach EB WB Northbound Southbound
Movement 1 4 7 8 9 10 11 12
Lane Configuration L L L TR LTR
v (vph) 0 91 22 45 2
C (m) (vph) 642 892 44 342 94
vie 0.00 O~ 10 O~50 0.13 0.02
950/0 queue length o~oo 0.34 1,,81 0.45 0.06
Control Defay 10~6 9~5 150~ 6 17.1 44~ 1
LOS B A F C E
Approach Delay -- -- 60~9 44~ 1
~pproach LOS -- -... F E
fi le:1 Ie: \Documents % 20and%20Setti ngs\medieOO 1 \Local %20Settings\Temp\u2k 145.. tmo
1/25/2006
Two-Way Stop Control
Page 1 of 2
TWO~WAY STOP CONTROL SUMMARY
General Information Site Information
Analyst E. Medina Intersection Site Approach / Black Cat
Rd.
Agency/Co. Wasington Group Int Juri sdicti 0 n ACHD
Date Performed 1/20/2006 Analysis Year 2011 Buidout
Analysis Time Period PM Peak Hour
Project Description Trilogy Residental Subdivision
East/West Street: Site Approach N orth/So uth Street: Black Cat Road
Intersection Orientation: North-South Study Period (hrs): 0.25
Vehicle Volumes and Adjustments
Major Street Northbound Southbound
Movement 1 2 3 4 5 6
L T R L T R
Volume 0 45 60 33 70 0
Peak..Hour Factor, PHF O~92 0.92 0.92 0.92 0..92 0.92
Hourly FJow Rate, HFR 0 48 65 35 76 0
Percent Heavy Vehicles 0 -- -- 2 -- --
Median Type Undivided
RT Channelized 0 0
Lanes 0 1 0 0 1 0
Configuration TR LT
Upstream Signal 0 0
Minor Street Westbound Eastbound
Movement 7 8 9 10 11 12
L T R L T R
Volume 35. 0 19 0 0 0
Peak-Hour Factor, PHF 0.92 0.92 O~92 0.92 0.92 .0.92
Hourly F'ow RateJ HFR 38 0 20 0 0 0
Percent Heavy Vehicles 0 0 0 0 0 0
Percent Grade (%) 0 0
Flared Approach N N
Storage 0 0
RT Channelized 0 0
Lanes 0 0 0 0 0 0
Cenf;g u rati on LR
Delay~ Queue Length and Level of Service
Approach NB 5B Westbound Eastbound
Movement 1 4 7 8 9 10 11 12
Lane Configuration LT LR
v (vph) 35 58
C (m) (vph) 1476 817
!VIe 0.02 0.07
95% queue length 0*07 0.23
Control Delay 7.5 9.7
LOS A A
Approach Delay ..... -- 9.7
Approach LOS -- ...... A
Rights Reserved
fi Ie ://C: \Documen ts %20and % 20Setti ngs\medieOO 1 \Local %20Setti ngs\ Temp\u2k6D. tmp
1/23/2006
US 20/2
13000 22400 24200 23400
12700 22100 24000 ~21400 23000
~ 11 t:
~
-0 0::
a:: 100 0 't)
~ 00 0 a::
~o 0 u~ r- ~o 8
L(}
~~ ~ .- 8 ~
cc ~v.t
<l>C") M m c 'I"""""
0 ~
0
:2
0 McMillan Rd. McMillan
4800 0 8 5900 8200
N ~
co
4700 5900 8400
....Jo. -..10
Rd ~ ~
8 8
0 a
~ &l
('f') ('\J -0
cr
8 o 10
co gu
WARRANTS FOR RIGHT-TURN TREATMENTS (45-50 mph)
Q) 25
E
::J
a
> 20
E
:J
f-
1: 15
Cl
a:
~ 10
:J:
~
m;
cf 5
18
~ 16
:J
'0 14
>
E 12
::J
~ 10
..c
Q)
a: 8
...
5 6
:c
~ 4 -
tU
a. 2 ~ w _. .
o r
o
Figure'11
Right..Turn Treatments (4/5 lanes)
. Posted Speed 45-50 mph
30 '
o
o
5000 10000 15000 20000 25000 30000 35000
Projected Volume on Major Street
Right Turn Treatments (2/3 lanes)
Posted Speed 45-50 mph
I J' \. '~~, ..' J: ~ }~., ~ " : -:~ · J'. , ~} ~~. >,;, ~., < , .. < .
5000 10000 15000 20000 25000 30000 35000
Projected Volume on Major Street
-
Radius
---
Taper
----
Turn Lane
-
Radius
---
Taper
.......
Turn Lane
72-F11 (3)
Transportation Resources at Community Planning Association, Meridian, Idaho
Page 1 of 2
At.c 0 MP ASS
,-,,-rf. COMMUNITY PLANNING ASSOCIATION
-.r- of Southwest Idaho
COMPASSHO!dB
Capacity
Guidelines
The Ada County Roadway Capacity Guidelines for Planning Applications is a general planning
guidance for policymakers of roadway thresholds using Annual Average Daily Traffic (AADT).
These thresholds (rounded to the nearest SOQ) were endorsed by the Commun[ty Planning
Association Board on February 24, 1997.
Ada County Planning Thresholds
FACILITY TYPE # LANES LOS 'e' LOS'D' LOS 'E'
FREEWAYS
4
60,000
6
90,000
REMARKS
70,000
82,000 peak hour=10O/o @ LOS
'E'; 11 % @ LOS 'CID~
peak hour=10O/o @ LOS
128,000 'E'; 11 % @ LOS 'C/D'
110,000
MUL TI.-LANE RURAUSUBURBAN (Limited Access Highway)
uncontrolled
4 60,000 70,000 80,000 intersections
4 30,000 35,000 40,000 ~~~::~e~~:::l at
uncon trolled
6 90,000 110,000 120,000 intersections
TWO-LANE RURAL HIGHWAYS
2 9,000
2 8,000
2 5,000
URBAN/SUBURBAN COLLECTORS
Central Business District (Downtown Area)
2 6,500
2 7,SOO
3 7,500
3 9,000
4 15,000
5 17,500
2 8,000
2 9,500
3 12,000
3 1.4,000
http://www.compassidaho~org!trans/capguide.htm
14,500
l2,000
8,500
23,000 level terrain
21,000 rolling terrain
18,000 mountainous terrain
7,000 8,000 \v ith par king
8,500 9,500 \of j tho II t pa rking
8,500 9,500 \vith parking
10,000 11,000 no i thou t pa rki ng
17,000 18,500 without parking
20,000 22,000 \vithout parking
9,000 10,000 one-\vay \vith parking
10,500 11,500 one-\vay,vithout
parking
13,500 15,000 o ne- \vay \vi th parking
15,500 17,500 one..\\.ray vrithout
1/19/2006
Transportation Resources at Community Planning Association, Meridian, Idaho
Non..Business District (SuburbanlUrban Area)
2 8,500
3 10,000
4 16,500
5 19,500
URBAN/SUBURBAN ARTERIALS
Central Business District (Downtown Area)
2 9,500
2 11,000
3 11,500
3 13,500
4 22,500
5 26,500
2 12,000
2 14,000
3 21.tOOO
4 28,000
5 35,000
parking
9,S 00
11,000
18,500
22,000
10,500
12,500
20,500
24,500
10)500 12,000 \vith parki ng
12,500 14,000 \vithout parking
12,500 14,000 with parking
15,000 16,500 ,vithout parking
25,000 28,000 \lrithou t par king
30,000 33,000 without parking
13,500 15,000 one-\V3Jl with parking
15,500 17,500 one- ,yay \vithout
pal~ king
23,500 26,000 one-way without
parki ng
31,500 35,000 one-way \\'ithout
parking
39,500 43,500 one-\\'ay \vithout
par king
.NODMBusiness District (Suburban/llrban Area)
2 12,500 14,000 15,500
3 15,000 17,000 18,500
4 25,000 28,000 31,000
5 30,,000 33,000 37,000
6 34,000 38,000 42,000
7 40,000 45,000 50,000
These thresholds \.vere developed by C01vLP ASS' Transportation Model Advisorv Committee (TNIAC).
Community Planning Association of Southwest Idaho
800 S. Industry Way, Suite 100
Meridian, Idaho 83642
(208) 855..2558 (voice); (208) 855-2559 (fax)
http://www~compassidaho~org!trans/capguide.htm
Page 20f2
1/19/2006
(
"
(
OJ
....,
ru
C)
..c
f.O
o
o
......
o
~
,..
N
C\I
~
~S
~
-r (t. \4..... 0 (s ~ Su 'P:,.
~ \, e:. G,.e.N
~ 0\ :=.
.Pe~ lL P 1'1\ =
s\\~
D l~"" ~
1/~9"7
\4;
C J l.flf 1,Q1 S. )
So~
~
I(" SO ~.I.
A~ "pEA-\!-
~
~;)S" <,
PM feA it..
lJ,; 'It
-4
?7'
l!.. ~ ..<1>..,*
, 0 0
_lJ-~- ~- :1
~ ~
~ tt:
= ~.:..."
~~, : 1 T 1 f r
"1 \'1. , 1'2.
vJ
Ee
1,.J~
E
s
T u{l. fo.t MoU f N\ t Nl ~
~t
~
1
--)
r ..J-;.
4:'<:11 79 Z
::~:::~~L:-- ~ - --~- :__u
'Y ~D
8 '\ ~--7 "1
. 0\
_ t.
/
\ ;?Q v
) ~, \
..J~,-l
L-- 9
-lIJ
'3510
'3 -~._, ,-::\ r~-,tf
\ -<j;---- .... - I. r
T ~~ ---...........
N " fL., t-t- 0 oF t;.. IT E ! j 3
SO&.4-+~ 0\ ~+e..
lilt; /_
II
--..:l)
3/0
34 /.. l ti
~ ~t
~
\~t ~ ~ 4:
-.. r-
~, "'12
B
1- r 10
iJ -.....- -
Ii+,
" - l '2. /t,)
vJ 141 -
3, '2. 2. /D
E.. --........-....- :-
147
~ ~' :' it ~ io
p.."
~.(Oa iD
---7'
2'
-->
~\2.
<-..
t~
(O.~3.K 0.35')( l~i)
4 .... ( Q. 37X o~ 3" Xttf7).:: ~''1 J t>
:3. ~ ~ 4 '1:.----
~ "
~ 3:; r'--=--(
., 0,37 )( O~~ 't. t~7) .::. 35: y.-
(D. ~3X 0..S".047 i;::::J f3S
;;: {JO / '2. J l' ~
~ltJO ;~
/'\ ~,
,.. '. j,)~ ..'r' t ;J
~ (',: ;. (", C ( ~ " ' ,^~_(f'I\~ ::\\ ~vl
~lJJJ -.~:;' t~~
"0 i" ;, \ -kl.. 1
l ,\ \ t{\
\\~V
./
STREET LOCATION I COMMENl CITY DATE COUNT DIRECTION AM PEAK PM PEAK
BITTERBRUSH DR S/O BRIARHILL DR 80lSE 10/22/200: 157 NB 6 3
CLASS I FICA Tl ON Tuesday SB 12
BITTEROOT DR N/O MCMULLEN ST 05/29/96 463 NB 10 24
CLASS I FICA TI 0 N Wednesday SB 15 18
BLACK CAT RD S/G AMITY RD ADA COUNTY 4/24/02 901 NB 50 26
APPROACH & TOTAL W ednesda y SB 39 72
N/O CHINDEN BLVD 6/20/2002 @ NB
APPROACH & TOTAL Thursday SB
SIO CHINDEN BLVD 9/30/04 @ NB 72 48
APPROACH & TOTAL Thursday SB 39 76
S/O COLUMBIA RD 4/16/03 764 NB 36 ]9
CLASS IFf C A TI ON Wednesday SB 10 44
N/O COLUMBIA ROAD 3/14/02 473 NB 47 13
APPROACH & TOTAL Thursday SB 14 38
N/Q DEER FLAT RD 6/22/04 1,926 NB 74 78
APPROACH & TOTAL Tuesda y sa 36 112
SIO FRANKLIN RD 4/28/04 2t672 NB 191 ]26
APPROACH & TOTAL Wednesday SB 86 J56
N/Q GREENHURST RD 8/19/99 736 NB
ITD COUNT Thursday SB
N/O KUNA RD 4/21/04 2,000 NB 69 7J
APPROACH & TOTAL Wednesday sa 64 84
S/O KUNA RD 3/20/02 385 NB 24 16
APPROACH & TOTAL Wednesday SB 8 20
S10 KUNA RD 8/11/04 395 NB 8 9
APPROACH & TOTAL Wednesday S8 3 22
N/O LAMONT ST 6/22/04 2,560 NB 73 85
APPROACH & TOTAL Tuesday S8 ]35 172
N/O USTICK RD 7/28/04 1,889 NB 112 62
APPROACH & TOTAL Wednesday sa 44 ] 14
N/Q VICTORY RD 4/22/03 1,979 NB 179 61
APPROACH & TOTAL Tuesday S8 60 132
SID VICTORY RD 4/22/03 C459 NB 141 45
APPROACH & TOTAL Tuesda y S8 48 ]01
S/O WARREN SPUR RD 6/26/2002 4 NB
APPROACH & TOTAL Wednesday SB
N/O CHERRY LN MERIDIAN 4/21/04 4,657 NB 124 263
APPROACH & TOTAL Wednesday S8 266 207
S/O CHERRY LN 4/28/04 3,792 NB 109 174
APPROACH & TOTAL Wednesday 5B 293 ] 9 J
BLACKS CREEK RD E/O 1-84 ADA COUNTY 1 ] /2/04 260 EB
ITD COUNT Tuesda y WB
BLOOM ST W/O COLLISTER DR BO ISE 5/25/04 C729 EB ]09 70
APPROACH & TOTAL Tu esday WB 45 114
06-Jul-05 Counts compiled by ACHD from traffic data collected by ACHD and lTD. 19 o.f 108
AM Peak is 7 :00 - 8:00 and PM Peak is 5 :00 .6:00.
STREET LOCATION I COMMEN1 ClTY DATE COUNT DIRECTION AM PEAK PM PEAK
CHERRY LN W/O BLACK CAT RD ADA COUNTY 6/25/03 6, I 10 EB 252 289
APPROACH & TOTAL Wednesday WB 206 345
W/O BLACKCAT RD 4/28/04 6~ 873 EB 369 316
APPROACH & TOTAL Wednesday WB 287 427
EtO VISTA A VE BOISE 08/1 6/94 406
APPROACH & TOTAL Tuesday
W/O VISTA AVE 12/10/03 2~O38 EB 67 68
APPROACH & TOTAL Wednesday WB 23 130
E/D BLACK CAT RD MERIDIAN 4/28/04 9,937 EB 548 451
APPROACH & TOTAL Wednesday WB 351 607
EtO LINDER RD 5/5104 23 t076 EB 1,135 771
APPROACH & TOTAL Wednesday WB 445 I t202
WIO LINDER RD 515/04 19,162 EB 957 693
APPROACH & TOTAL Wednesday WB 350 1,057
W/O MERIDIAN RD ] 0/29/03 24}528 EB 1,1]8 902
APPROACH & TOTAL Wednesday WB 432 ] ,353
E/O TEN MILE RD 515/04 15,719 EB 704 611
APPROACH & TOTAL Wednesday WB 330 859
CHESTNUT DR S/O NORTHVIEW ST BOISE J 131/0 I 85 NB 4 11
APPROACH & TOTAL Wednesday SB 3 5
CHINDEN BL VO WID BLACK CAT RD ADA COUNTY 5/12/04 G3;569~ EB 985 517
APPROACH & TOT AL Wednesday WB 440 795
W/O LINDER RD 5/12/04 16)'621 EB I ; 064 595
APPROACH & TOTAL Wednesday WB 499 982
8/0 MERIDIAN RD 1/30/2003 15;301 EB 916 533
APPROACH & TOTAL Thursda y WB 453 947
W/Q MERIDIAN RD 1/30/2003 13,985 EB 876 492
APPROACH & TOTAL Thursda y WB 402 845
EtQ STAR RD 3/24/04 12)'856 EB 915 515
APPROACH & TOTAL Wednesday WB 420 8]4
W/D STARRD 3/24/04 ] 1,624 EB 696 513
APPROACH & TOTAL Wednesday WB 464 686
W/O TEN MILE RD 7/14/04 c.0Y EB 970 513
APPROACH & TOTAL Wednesday WB 420 766
W/O CLQVERDALE RD BOISE 1 III 7/04 25}237 BB J ~36 ] 839
ITD COUNT Wednesday WB 649 1,425
E/O EAGLE RD 7/14/04 29~469 EB 1,447 838
APPROACH & TOTAL Wednesday WB 565 1,509
W/O FIVE MILE RD 12/3/03 23,226 EB 950 1 t 039
APPROACH & TOTAL Wednesday WB 820 968
W/O EAGLE RD EAGLE 3/11/2003 2 I ~42 7 EB I ,222 813
APPROACH & TOTAL Tuesday WB 600 ] ,205
E/D LOCUST GROVE RD ] /22/2003 J 7 J ] 49 EB 949 629
APPROACH & TOTAL Wednesday WB 50] 987
06-Jul-05 Counts compiled by ACHD from traffic data collected by ACHD and lTD. 26 0.(108
AM Peak is 7:00 ~ 8:00 and PM Peak is 5;00 -6:00.
"C "C"
ce I 0
c: r:
cD ~i i j g
C) 1I '"
C1J ..J Gt
...J CD
~ :S E ~
ig~~~ rn .... III ~
en ~z z w u fi
... iti~i~8 ~ ~!~~ ~ i loo Gi 1) c
0 s e 0 iiJa.!~~
~ Bus ...c::
:2 ii0C._ :& 9Q.g:~ rI ::'::EQ 111m!
\\\\\\ \\~\\~\ DDOElIDIJI
r-..
Q
('t)
C
~
.....
Q;
Cii
u
en
..
n:s
o
-'&::
(.)
CU
-
CO
L-
a
~--
GJ.C
c~
CD'-
C):J
1,..U
.g m~
.~e
1;j:)
CO
l'U~ .
~.8Q
~o~
._ t:"
~~5
eE<
L.Z
000::
~ fUf2
-E
.5 0.0
ccoW
mE(/)
5~~
~-'lD
'550
o......t-
"5mJ-
o~o
~ g-z
.!!I_en
U)ns-
"l:JSa.
~~~
~ ~cn
~.!2:c
&Sf-
m~ <ci
~ :>.:g
.~5~
c.,.0Q)
E ~.!
~.s:5
.....eo
PM Black Cat & McMillan
~~~~j ~~i~,w~'61~1'~ilij ;i~iJ~~~~J;lH1~~iis~~~ ~~;t~~~l;rl~r~~ :~ficllil~1
EBL 1 1 7 8
EST 2 1 23 20 43
EBR 0 0 0 0
WBL 58 64 45 1 09
WBT 42 46 26 72
WBR 1 0 1 1 54 65
NBL 4 5 0 5
NBT 45 50 1 0 60
NBR 9 1 0 36 46
SBL 3 3 65 68
SBT 49 54 6 60
SBR 0 0 4 4
T ota I 243 268 273 541
*Assumes a growth rate of 20/0 for Meridian Road based on North Meri
/' \
t: fl c:y~ e<?{ \~j
So )~~iiY\.S
g~J.
NvJ
- ?rb{JoSeJ ~(u.p~*
_ bl1 ~ CY^-} JC:J
I~
J ic t~; ~
\fl
'-0
,/
~
c1J
c.,
-c
o
{ .~
.~
---.
~
(j)
r
\~
o <5
~glij:rgmrnm
8 '5 ~ ~ ~ ~ -~
t...o<(<<c<(~
.~.Q. goo 0 0
~ ctI._.5.C C c:
..::;~:E~iE~:E
CD .......
<<J <r-
U)f'-.
:;!O>