Loading...
Burnett Phase 2 Traffic Analysis - updated 1-31-07 no appendTransportation Engineering Northwest DATE: January 31, 2007 TO: Tami Merriman, City of Yelm FROM: Jeff Schramm, Transportation Engineering Northwest CC: Steve Chamberlain, The SCA Group Updated Traffic Impact Analysis RE: UPDATED Traffic Impact Analysis -Burnett Commercial Park Phase 2 TENW Project No. 4130 This updated traffic impact analysis has been prepared for Phase 2 of the Burnett Commercial Park development. Phase 2 of the development has changed, and this memo updates the traffic impacts associated with the Phase 2 site plan changes. The future background conditions without the project have also changed based on comments provided by the City. Project Description Phase 1 has already been constructed and consists of about 70,000 square feet of mini- storage space. Phase 2 would be a mixed-used development consisting of about 7,100 square feet of retail space on the bottom floors of Buildings A and B, along with 4,450 square feet of professional office on the top floor of Building A. The project site is located on the east side of Burnett Road in the City of Yelm. Vehicular access occurs at one driveway on Burnett Road. Build-out of Phase 2 is expected to be completed in 2008. A project site vicinity map is shown in Figure 1, and an updated site plan is shown in Figure 2. Existing Traffic Volumes Existing weekday PM peak hour traffic volumes, which were provided by the City, were collected in September 2006 at the following 6 study intersections between the 4:00 and 6:00 p.m. peak period: 1. SR 510 (Yelm Avenue) / Burnett Road 2. SR 510 (Yelm Avenue) /Mountain View Road 3. SR 510 (Yelm Avenue) / Killion Road 4. SR 510 (Yelm Avenue) / Cullens Street 5. SR 510 (Yelm Avenue) / Longmire Street 6. SR 510-SR 507 (Yelm Avenue) / SR 507 (1St Street SE) Figure 3 illustrates the 2006 existing PM peak hour traffic volumes at the study intersections. Existing count sheets are provided in Appendix A. Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting 816 6"' Street S. • Kirkland, WA 98033 • Office (206) 396-8286 • Fax (425) 889-TENW (8369) Transportation Engineering North~/est January 31, 2007 Page 2 88th Ave ae b Prairie Vista Loop 3 Project m Site ' .~ a 0 a o ~ F 'a ~P,~ ~, ~ J ~GP a U V ~4 [.~` . ~Dd`P~ p{.~ .. ~d ~4 2t~ Berry Valley Rd ,~a~ l,y4, ~` ~y d~~ ~~ A_ ~C+b 1SL . / / ~ Lvngniire 5[ s'~~,~~L`4 ~ ~GF 5fl7~'yq GP /'~ S ~St ` / x ' 5a7. - (Nor to Scare] Burnett Transportation Figure ~ Ca1l~mer~ial Park Engineering Yelm, WA Northwest, r_LC Project Site Vicinity Upd3ie~f T~,~F9c Imp3Ct Andly;ES Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting 816 6"' Street S. • Kirkland, WA 98033 • Office (206) 396-8286 • Fax (425) 889-TENW (8369) Transportation Engineering North~/est January 31, 2007 Page 3 Mini 5[orage is all built, some [50°f°j occupied. Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting 816 6"' Street S. • Kirkland, WA 98033 • Office (206) 396-8286 • Fax (425) 889-TENW (8369) Transportation Engineering North~/est January 31, 2007 Page 4 (NOf to Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting 816 6"' Street S. • Kirkland, WA 98033 • Office (206) 396-8286 • Fax (425) 889-TENW (8369) Transportation Fi u re 3 Burnett g Ca1l~mereial Park Engineering ~ppb Existing PM Peak Hour re~~», wA Northwest, r_LC Traffic Volumes Up[1aip~f T~aF9c Im Vacs AnJl pis Transportation Engineering North~/est January 31, 2007 Page 5 Existing Intersection Level of Service (LOS) Level of service (LOS) serves as an indicator of the quality of traffic flow and degree of congestion at an intersection or roadway segment. It is a measure of vehicle operating speed, travel time, travel delays, and driving comfort. Level of service is generally described by a letter scale from A to F. LOS A represents free-flow conditions, i.e. motorists experience little or no delays, and LOS F represents forced-flow conditions. Intersection LOS were calculated using the methodology and procedures outlined in the 2000 Highway Capacity Manual, Special Report 209, Transportation Research Board using the Synchro software program. Existing weekday PM peak hour LOS analysis results for the study intersection are summarized in Table 1. Table 1. Burnett Commercial Park Phase 2 Existing PM Peak Hour LOS Summary Study Intersection Movement LOST elay2 /C3 Unsignalized: 1. SR 510 (Yelm Ave) / Burnett Rd Eastbound Left A 1 0.02 Southbound D 27 0.18 2. SR 510 (Yelm Ave) /Mountain View Rd Eastbound Left A 1 0.01 Southbound E 42 0.22 3. SR 510 (Yelm Ave) / Killion Rd Eastbound Left A 1 0.00 Westbound Left A 1 0.03 Northbound C 19 0.04 Southbound F 65 0.25 4. SR 510 (Yelm Ave) / Cullens St Eastbound Left A 9 0.09 Westbound Left B 10 0.01 Northbound F 70 0.18 Southbound F 73 0.69 5. SR 510 (Yelm Ave) / Longmire St Eastbound Left A 1 0.01 Westbound Left A 1 0.03 Northbound E 47 0.33 Southbound E 30 0.19 Signalized 4: 6. SR 510-SR 507 (Yelm Ave) / SR 507 (lgt St SE) D 39 0.83 1. LOS analyses are based on methodologies established in the 2000 Highway Capacity Manual. 2. Delay =average control delay per vehicle. 3. V/C represents the ratio of traffic volume to capacity. 4. All signals were assumed to be actuated; splits were optimized. As shown in Table 1, most of the side-street approaches at the study intersections on Yelm Avenue currently operate in the LOS D to LOS F range during the PM peak hour. The detailed intersection LOS results are provided in Appendix B. Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting 816 6"' Street S. • Kirkland, WA 98033 • Office (206) 396-8286 • Fax (425) 889-TENW (8369) Transportation Engineering North~/est January 31, 2007 Page 6 Project Impact Analysis Trip Generation The trip generation for the proposed Phase 2 development, as shown in Table 2, was estimated based on trip generation rates provided by the City of Yelm for Administrative Office and Miscellaneous Retail uses. Phase 2 is estimated to generate about 364 total trips per day, with 162 (45%) of these trips being pass-by/diverted trips that would only occur at the site driveway and on Burnett Road at the intersection with SR 510 (Yelm Avenue). The remaining 202 daily trips would be new trips to the area road network. About 52 total trips would be generated during the weekday PM peak hour, which would consist of 19 pass-by/diverted trips and 33 net new trips. Table 2. Burnett Commercial Park Phase 2 Trip Generation Summary PM Peak Hour Daily Land Use Size Ratel Total In Out Ratel Trips Administrative Office Total Trips 4,450 GFA 4.09 18 3 15 11.01 49 Less Pass-by Trips (10%) -2 -1 -1 -5 Net New Trips 16 2 14 44 Miscellaneous Retail Sales Total Trips 7,100 GFA 4.8 34 18 16 44.32 315 Less Pass-by Trips (50%) -17 -8 -9 -157 Net New Trips 17 10 7 158 Total Trips Total Trips 52 21 31 364 Less Pass-by Trips (45%) -19 -9 -10 -162 Net New Trips 33 12 21 202 1. Trip rates adopted by City of Yelm. 2. 1,000 GFA is Gross Floor Area. Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting 816 6"' Street S. • Kirkland, WA 98033 • Office (206) 396-8286 • Fax (425) 889-TENW (8369) Transportation Engineering North~/est January 31, 2007 Page 7 Trip Distribution and Assignment Using standard engineering practices and guidelines, new vehicle trips generated by the Phase 2 development were distributed and assigned to the surrounding street system based on local traffic patterns, and based on direction from City staff. As shown in Figure 4, project trips were generally distributed to the local street system as follows: • 25 percent to the northwest via Yelm Avenue (SR 510). • 75 percent to the southeast via Yelm Avenue (SR 510). Phase 2 new project trips generated in the PM peak hour were assigned to the 6 study intersections based on the travel patterns illustrated in Figure 4. Traffic Volume Impact Future traffic volumes with and without the proposed Phase 2 project were estimated for PM peak hour conditions in the year 2008. Future traffic volumes at the study intersections were developed based on existing peak hour traffic counts increased to account fora 2 percent annual background growth. In addition to the background growth rate, traffic generated by the following 10 pipeline projects were added to existing conditions to determine 2008 PM peak hour traffic volumes without the project. 1. Terra Valley Residential Development (40 PM peak hour project trips) 2. Mountain Shadow (88 PM peak hour project trips) 3. Mountain Sunrise (109 PM peak hour project trips) 4. Yelm Retail (800 PM peak hour project trips) 5. Hutch Subdivision (119 PM peak hour project trips) 6. Green Village Subdivision (54 PM peak hour project trips) 7. Cherry Meadows (185 PM peak hour project trips) 8. Willow Glen Phase 3 (56 PM peak hour project trips) 9. Tahoma Terra Phase 1 & 2 (512 PM peak hour project trips) 10. Burnett Commercial Park Phase 1 (18 PM peak hour trips) Figure 5 illustrates the total PM peak hour traffic generated by these 9 pipeline projects at the 6 study intersections. Weekday PM peak hour traffic volumes for year 2008 without the project are shown on Figure 6. Adding the project-generated PM peak hour trips (shown in Figure 4) to the future without-project traffic volumes (Figure 6), results in future with-project traffic volumes, as shown in Figure 7. The detailed future year traffic volume estimates with and without the Phase 2 project are provided in Appendix C. Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting 816 6"' Street S. • Kirkland, WA 98033 • Office (206) 396-8286 • Fax (425) 889-TENW (8369) Transportation Engineering North~/est January 31, 2007 Page 8 Transportation Figure 4 Burnett Ca1l~mereial Pa~~k Engineering PM Peak Hour Yeim, WA Northwest, r_LC Trip Distribution and Assignment Upd3ie~f T~,~F9c Impact Andlpis Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting 816 6"' Street S. • Kirkland, WA 98033 • Office (206) 396-8286 • Fax (425) 889-TENW (8369) Soa - (Nor to Scare] Transportation Engineering North~/est January 31, 2007 Page 9 (Nor to Scale) Transportation FI ure 5 Burnett ~ Ca1l~mereial Park Engineering pipeline Project PM Peak Hour re~~», wA Northwest, r_LC Traffic Volumes U11[13SPlf T~,~F9[ ImpJ(t Anyl plS Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting 816 6"' Street S. • Kirkland, WA 98033 • Office (206) 396-8286 • Fax (425) 889-TENW (8369) Transportation Engineering North~/est January 31, 2007 Page 10 (Nor to Scale) Figure 6 Burnett Transportation Calltmer~ial Park Engineering ZODB Without Project Yeim, WA Northwest, r_LC PM Peak Hour Traffic Volumes Uoda[esf T~aF9c Impact Analnls Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting 816 6"' Street S. • Kirkland, WA 98033 • Office (206) 396-8286 • Fax (425) 889-TENW (8369) Transportation Engineering North~/est January 31, 2007 Page 11 SR S Ip {Ye1m Aveyl 88th A ,b ~ ~ti ~ ~ ~ `j ~~~ b / ~y ,( Sf Prairie Vista Loop 3 ~F~ y Ray Project m ~ ~. Site e C f~giP .~ C a O ~ SR 5 ] D (Yelm Ave]I yo b ~f~~ yo r~~`~ ~ J3fOS ~ ~ {~ ~ ~~l~y ~' ~f`~~~ a SR 510 ~Yelm Ave~l 1p 'R Bumecc Raad cn a9 ~.. 28 44 ao~r~ P!.}~ 'n ~ ro ~~'~o a U l ps ~ ~ Yp ~ \. y X62 V SR 510 {Ye9rn Ave}I i 4'h r~'1+e {~` ~ ~ l0. ~~ ~d SR 510 {Yelm Ave}I ~pfi Gi`" ~f ~ ~l~s ~ et~0 ~ w p,~~l ~' ~bo c~~ Berry Valley Rd ,~a~ ` ~ ~b,~ a~ ~'~~ ~~~~q ~ t ,Y ~~ s r~ s8 ,~ t ~a~` ~ ~8,~ b~ SL~ Y ^T ~ 1 SR 510 {Yelm Ave)1 C~- D~~ r~ Lan mire Screec N~ A _ 2/ ~ b R~ ; n4 ' T~s~ P,gLP ~~..~~, ,F %~ ~~ r ~,~9~ GF x{17-.}q P. ~~~ 1 Q, G ~~ Ab O ~ y"~n s~ ~~ ~~ ! ' S~ ~St a[ ' 5a7. - (Nor to Scare] Transportation Figure 7 Burnett Ca1l~mereial Park Engineering 2008 With Project Yeil,i, WA Northwest, r_L~ p~ Peak Hour Traffic Volumes Up[1aSP~f T~,~F9c Impact Andlyeii Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting 816 6"' Street S. • Kirkland, WA 98033 • Office (206) 396-8286 • Fax (425) 889-TENW (8369) Transportation Engineering North~/est January 31, 2007 Page 12 Intersection LOS Impact The weekday PM peak hour intersection LOS analysis results in 2008 at the study intersections are summarized in Table 3. The table is set-up to show intersection LOS in the future without and with the proposed Phase 2 development. The detailed intersection LOS results are provided in Appendix B. Table 3. Burnett Commercial Park Phase 2 2008 PM Peak Hour LOS Summary 2008 Without-Project 2008 With-Project Intersection Movement LOS' Dela~~ V/C3 LOS Delay V/C Unsignalized: 1. SR 510 (Yelm Ave) / Burnett Rd Eastbound Left Southbound 2. SR 510 (Yelm Ave) /Mountain View Rd Eastbound Left Southbound 3. SR 510 (Yelm Ave) / Killion Rd Eastbound Left Westbound Left Northbound Southbound 4. SR 510 (Yelm Ave) / Cullens St Eastbound Left Westbound Left Northbound Southbound 5. SR 510 (Yelm Ave) / Longmire St Eastbound Left Westbound Left Northbound Southbound Signalized 4: 6. SR 510-SR 507 (Yelm Ave) / SR 507 (lgt St A 2 0.05 A 2 0.05 F 80 0.68 F 173 1.03 A 2 0.04 A 2 0.04 F >100 >1.00 F >100 >1.00 A 5 0.09 A 5 0.09 A 1 0.03 A 1 0.04 D 26 0.06 D 26 0.07 F >100 >1.00 F >100 >1.00 B 11 0.16 B 11 0.16 B 12 0.02 B 12 0.03 F > 100 0.66 F > 100 0.70 F >100 >1.00 F >100 >1.00 A 1 0.02 A 1 0.02 B 14 0.36 B 15 0.36 F >100 >1.00 F >100 >1.00 F >100 >1.00 F >100 >1.00 1.10 1.10 SE) F 105 F 106 1. LOS analyses are based on methodologies established in the 2000 Highway Capacity Manual. 2. Delay =average control delay per vehicle. 3. V/C is ratio of traffic volume to capacity. 4. Signals were assumed to be actuated; splits were optimized under each scenario. As shown above, side-street turns at the study intersections on Yelm Avenue are anticipated to operate at LOS F in the future during the PM peak hour with or without the proposed Phase 2 development in 2008. The signalized study intersection of Yelm Avenue at First Street is also expected to operate at LOS F with or without the project in 2008. Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting 816 6"' Street S. • Kirkland, WA 98033 • Office (206) 396-8286 • Fax (425) 889-TENW (8369) Transportation Engineering North~/est January 31, 2007 Page 13 Turn Lane Warrant Evaluation Left- and right-turn movements represent critical turning movements at unsignalized intersections, increasing the potential for intersection delay and safety issues. Therefore, an evaluation of the potential need for aleft- and right-turn lane onto SR 510 (Yelm Avenue) at its intersection with Burnett Road was conducted based upon the WSDOT Design Manual, January 2005, considering PM peak hour conditions in 2008 with the project and 10 other pipeline projects. An eastbound left-turn lane (Figure 910-8a, Left-Turn Storage Guidelines, Two-Lane, Unsignalized) is warranted based upon an approximate 4 percent left-turn with a total eastbound/westbound entering volume of approximately 1,798 vehicles during the PM peak hour. The eastbound left-turn lane should be a minimum of 100 feet (Figure 910-9a Left-Turn Storage Length, Two-Lane Unsignalized). It should be noted that the eastbound left-turn lane would be warranted with or without Phase 2 of the Burnett Commercial Park Development in 2008. Additionally, a westbound right-turn lane (Figure 910-11, Right-Turn Lane Guidelines) would be warranted at the intersection based upon aright-turn volume of 42 vehicles with 704 westbound approach volumes during the PM peak hour in 2008. The right-turn lane should be a minimum of 280 feet with a 50-foot minimum taper (Figure 910-13 Right-Turn Lane) based upon a 35 mph design speed (25 mph posted speed + 10 mph). Transportation Impact Fees The City of Yelm administers a traffic impact fee of $750 per PM peak hour trip. Based upon this trip rate, the Phase 2 traffic impact fee would be $24,750 (33 trips x $750 per trip). If you have any questions, please contact Jeff Schramm at (206) 396-8286 or schramm@tenw.com Transportation Engineering/Operations • Impact Studies • Design Services • Transportation Planning/Forecasting 816 6"' Street S. • Kirkland, WA 98033 • Office (206) 396-8286 • Fax (425) 889-TENW (8369)