Appendix D Traffic Impact Analysis - westplainseis.com

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Transit service is provided to Airway Heights by Spokane Transit Authority (STA) via Route 61. This route terminates within the City of Spokane at the downtown transit plaza and makes stops at the Airway Heights Park & Ride west of Hwy 2/Lawson and within Fairchild Air Force Base, seven days a week. During peak period busses operate with one-half hour headways and off peak periods have one-hour headways. West Plains Development – Spokane Tribe Page | 88 Traffic Impact Analysis April 28, 2011
9. RECOMMENDATIONS Mitigation recommendations are summarized below for each project alternative. At locations where traffic signalization is recommended, a signal warrant analysis was completed to aid in determining if signalization was an appropriate improvement alternative to consider. The off-site improvements not contiguous with the project site should be constructed in a phased manner so that they are installed at the appropriate time and roughly corresponding to the phase of project development being undertaken. For off-site improvements that are not contiguous with the project site or related to site access, the Spokane Tribe should contribute its proportional share of the cost required to construct the identified improvements. Recommend improvements are summarized below along with the project’s estimated proportional fair share contribution. Alternative 1 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) West Plains Development – Spokane Tribe Page | 89 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
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INTERSECTION MITIGATION - ALTERNATI
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MITIGATION-ALT 2, CONTINUED 2012 PM
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MITIGATION-ALT 3, CONTINUED INTERSE
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• 41,633-square-foot commercial d
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Project Site J 908 N. Howard St. St
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J Map from Friedmutter Group, Decem
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2.5 Methodology The weekday PM peak
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2.7 Applicable Standards, Policies
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3. EXISTING CONDITIONS 3.1 Street N
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3.5 Traffic Volumes The bulk of int
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Pipeline Project Description and As
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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 76 and 77: MITIGATION-ALT 2, CONTINUED 2012 PM
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Page 91 and 92: 2032 Alternative 2 Mitigations:
Page 93: 8. CONCLUSIONS Based upon the techn
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 122 and 123: APPENDIX C TRIP GENERATION/INTERNAL
Page 124 and 125: TRIP GENERATION LAND USE: SHOPPING
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Page 128 and 129: TRIP GENERATION LAND USE: POLICE ST
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ITE Multi-Use Project Internal Capt
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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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