Appendix D Traffic Impact Analysis - westplainseis.com

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INTERSECTION MITIGATION - ALTERNATIVE 1, CONTINUED 2012 PM Peak BG + Alt1-Ph1 2015 PM Peak BG + Alt1-Ph2 2019 PM Peak BG + Alt1-Ph3 2032 PM Peak BG + Alt1-Ph3 Craig Rd. / CM = SBLTR CM = SBLTR CM = SBLTR CM = SBLTR SR 902 LOS = F LOS = F LOS = F LOS = F Signalized Roundabout Delay = 421.4 Delay = 671.9 Delay = * Delay = * LOS = B LOS = B LOS = B LOS = C Delay = 15.6 Delay = 16.4 Delay = 17.6 Delay = 20.5 LOS = A LOS = A LOS = B LOS = B Delay = 8.6 Delay = 9.4 Delay = 10.4 Delay = 16.1 Hwy. 2 / -- -- -- LOS = F Fairchild AFB Delay = 90.6 Modify Signal Timing, Add NB Lt. turn bay and WB through lane Craig Rd. / Sixth Ave. -- -- -- -- -- Add NB Right turn bay -- -- CM = WB Lt LOS = E Delay = 44.0 CM = WB Lt LOS = D Delay = 28.8 Roundabout -- -- -- LOS = D Delay = 50.5 CM = WB Lt LOS = F Delay = 89.9 CM = WB Lt LOS = E Delay = 47.3 LOS = C Delay = 20.5 Hwy. 2 / CM = SBL CM = SBL CM = SBL CM = SB Lt Dwy. Middle LOS = F LOS = F LOS = F LOS = F Signalize, Add EB & SB Left turn lanes Modify Signal Timing, Channelize WB Rt. Turn as 'Free' movement Craig Rd / Dwy. North Roundabout Delay = * Delay = * Delay = * Delay = * LOS = C LOS = D LOS = D LOS = E Delay = 31.1 Delay = 38.8 Delay = 45.4 Delay = 62.3 -- -- -- LOS = D Delay = 51.0 LOS = A LOS = B LOS = E LOS = F Delay = 9.8 Delay = 18.6 Delay = 61.3 Delay = 110.0 -- -- -- Add NB Thru Lane -- -- -- Roundabout -- -- -- CM = EB Lt LOS = F Delay = 68.2 CM = EB Lt LOS = E Delay = 37.3 LOS = B Delay = 11..4 West Plains Development – Spokane Tribe Page | 64 Traffic Impact Analysis April 28, 2011
Listed below are improvements recommended for consideration to reduce traffic impacts associated with the subject project. The project’s recommended proportional share contribution to each mitigation is also listed. The proportional share for off-site intersections is calculated by divided the project generated traffic volume by the total intersection volume for each respective scenario. 2012 (Phase 1) Mitigations: Hwy 2 / Craig: Install traffic signal and widen the NB and SB approaches to provide and exclusive left turn lane. Alternatively, consider installation of a roundabout. Project Proportional Share: 34.2% Resulting LOS & Delay (sec): C/31.6 / A/7.8 Hwy 2 / Hayford: Optimize signal timing and consider converting the inside SB thru lane to a 2 nd SB left turn lane. Project Proportional Share: 15.8% Resulting LOS & Delay (sec): D/45.9 Craig / SR 902: Install traffic signal or consider installation of a roundabout. Project Proportional Share: 23.7% Resulting LOS & Delay (sec): B/15.6 / A/8.6 (roundabout) Hwy 2 / Middle Driveway: Install traffic signal and approach improvements (SB Middle Driveway); install a WB right turn lane. Alternatively, consider installation of a roundabout. Project Proportional Share: 100% Resulting LOS & Delay (sec): A/9.8 2015 (Phase 2) Mitigations: Hwy 2 / Craig: Install traffic signal and widen/improve intersection approaches to include dual EB, NB and SB left turn lanes and a 2 nd NB thru lane. Alternatively, consider installation of a roundabout. Project Proportional Share: 36.0% Resulting LOS & Delay (sec): D/44.7 / B/12.4 Hwy 2 / Lundstrom: Restripe and widen approaches to accommodate exclusive NB and SB right turn lanes. Project Proportional Share: 29.8% Resulting LOS & Delay (sec): F/63.3 Hwy 2 / Hayford: Optimize signal timing and consider converting the inside SB thru land to a 2 nd SB left turn lane. Restripe the wide paved median for a 2 nd WB left turn lane. Alternatively, widen the EB and NB approaches for exclusive right turn lanes along with adding the 2 nd WB left turn lane. Project Proportional Share: 17.7% Resulting LOS & Delay (sec): E/60.4 / D/54.0 (alternative) Craig / SR 902: Install traffic signal or consider installation of a roundabout. Project Proportional Share: 27.7% Resulting LOS & Delay (sec): B/16.4 / A/9.4 (roundabout) Hwy 2 / Middle Driveway: Install traffic signal and approach improvements (SB Middle Driveway); install a WB right turn lane. Alternatively, consider installation of a roundabout. Project Proportional Share: 100% Resulting LOS & Delay (sec): D/38.8 / B/18.6 (roundabout) West Plains Development – Spokane Tribe Page | 65 Traffic Impact Analysis April 28, 2011
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APPENDIX D TRAFFIC IMPACT ANALYSIS
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TABLE OF CONTENTS 1. EXECUTIVE SUMM
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Table 7. Alternative 1 - PM Peak Ho
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• 10,480-square-foot Tribal Cultu
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Hwy. 2 / Hayford Rd. S 2012 - Phase
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Hwy 2 / Lundstrom: Restripe and wid
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2032 Alternative 2 Mitigations (in
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Table ES- 2. Operational Analysis S
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Table ES- 4. Operational Analysis S
Page 20 and 21: INTERSECTION MITIGATION - ALTERNATI
Page 22 and 23: MITIGATION-ALT 2, CONTINUED 2012 PM
Page 24 and 25: MITIGATION-ALT 3, CONTINUED INTERSE
Page 26 and 27: • 41,633-square-foot commercial d
Page 28 and 29: Project Site J 908 N. Howard St. St
Page 30 and 31: J Map from Friedmutter Group, Decem
Page 32 and 33: 2.5 Methodology The weekday PM peak
Page 34 and 35: 2.7 Applicable Standards, Policies
Page 36 and 37: 3. EXISTING CONDITIONS 3.1 Street N
Page 39: 3.5 Traffic Volumes The bulk of int
Page 42: Pipeline Project Description and As
Page 46: 4.4 Operational Analysis and Level
Page 50 and 51: 5. TRIP GENERATION and DISTRIBUTION
Page 52 and 53: 5.3 Trip Generation - Alternative 2
Page 54 and 55: 5.6 Trip Reductions and Net New Tri
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Page 65: 6.1.2 ALTERNATIVE 1 - 2015 Phase 2
Page 69: 6.1.4 ALTERNATIVE 1 - MITIGATION Th
Page 73: 6.1.5 ALTERNATIVE 2 - 2012 Buildout
Page 76 and 77: MITIGATION-ALT 2, CONTINUED 2012 PM
Page 79 and 80: 6.1.8 ALTERNATIVE 3 - MITIGATION Th
Page 81 and 82: The Spokane Tribe should work with
Page 87 and 88: Table 22. Level of Service for 2032
Page 89 and 90: Alternative 3 is projected to gener
Page 91 and 92: 2032 Alternative 2 Mitigations:
Page 93 and 94: 8. CONCLUSIONS Based upon the techn
Page 95 and 96: 9. RECOMMENDATIONS Mitigation recom
Page 97 and 98: Hwy 2 / Hayford: Optimize signal ti
Page 99: Hwy 2 / Fairchild AFB: Modify signa
Page 102 and 103: APPENDIX A TRAFFIC COUNT DATA Appen
Page 104 and 105: PROJECT: West Plains Development DA
Page 112 and 113: 1 PROJECT: DAVID EVANS and ASSOCIAT
Page 114 and 115: PROJECT: Project Location INTERSECT
Page 116 and 117: Pipeline (Year 2012) Int. # INTERSE
Page 118 and 119: Pipeline (Year 2015) Int. # INTERSE
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Pipeline (Year 2019) Int. # INTERSE
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APPENDIX C TRIP GENERATION/INTERNAL
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TRIP GENERATION LAND USE: SHOPPING
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TRIP GENERATION LAND USE: Quality S
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TRIP GENERATION LAND USE: POLICE ST
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ITE Multi-Use Project Internal Capt
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APPENDIX E SYNCHRO WORKSHEETS Appen
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HCM Unsignalized Intersection Capac
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HCM Signalized Intersection Capacit
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APPENDIX E4 YEAR 2019 EXISTING PLUS
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APPENDIX E6 ALTERNATIVE 1 YEAR 2015
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YEAR 2032 SYNCHRO WORKSHEETS Append
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APPENDIX F SIDRA ANALYSIS WORKSHEET
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MOVEMENT SUMMARY Craig Rd./Hwy. (YE
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INTERSECTION SUMMARY Craig Rd./Hwy.
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QUEUE DISTANCE Largest 95% Back of
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INTERSECTION SUMMARY Middle Dwy./Hw
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MOVEMENT SUMMARY Middle Dwy./Hwy. (
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MOVEMENT SUMMARY Craig Rd./Hwy. 902
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YEAR 2032 SIDRA ANALYSIS WORKSHEETS
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MOVEMENT SUMMARY Craig Rd./6th Ave.
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MOVEMENT SUMMARY Craig Rd./Dwy. Nor
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8 Hour-100%-Minimum Volume - Craig-
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8 Hour-100%-Minimum Volume - Craig-
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8 Hour-100%-Minimum Volume - Middle
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8 Hour-100%-Minimum Volume - Middle
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8 Hour-100%-Minimum Volume - SR-902
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8 Hour-100%-Minimum Volume - SR-902
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ADDENDUM TO TRAFFIC IMPACT ANALYSIS
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overall site plan would not be sign
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In lieu of the various mitigations
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Project Proportional Share: 29.8% F
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Hwy 2 / Fairchild AFB: Modify signa
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Attachment B: Two Roundabout Access
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Attachment C: Operational Analysis
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LEVEL OF SERVICE SUMMARY West Dwy./
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MOVEMENT SUMMARY West Dwy./Hwy. (YE
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MOVEMENT SUMMARY West Dwy./Hwy. (YE
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MOVEMENT SUMMARY West RB 2032 Alt.1
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LEVEL OF SERVICE SUMMARY West RB 20
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MOVEMENT SUMMARY West RB 2032 Alt.3
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LEVEL OF SERVICE SUMMARY Middle Dwy
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LEVEL OF SERVICE SUMMARY Craig Rd./
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Appendix D Traffic Impact Analysis - westplainseis.com

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