Appendix D Traffic Impact Analysis - westplainseis.com

Recommendations

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Hwy. 2 / Hayford Rd. S 2012 – Phase 1 2012 – Buildout + Craig Rd. / Deno Rd. U + + + Craig Rd. / McFarlane St. U + + + Craig Rd. / Thorpe Rd. East U + + + Craig Rd. / Thorpe Rd. West U + + + Craig Rd. / SR 902 U 2012 – Phase 1 2012 – Buildout 2012 – Buildout Hwy. 2 / Fairchild AFB S + + + Craig Rd. / 6 th Ave. U 2019 – Phase 3 + + Hwy 2 / Driveway West U + + + Hwy 2 / Driveway Middle U 2012 – Phase 1 2012 – Buildout 2012 – Buildout Hwy 2 / Driveway East U + + + Craig Rd. / Driveway North U + + + Craig Rd. / Driveway Middle U + + + Craig Rd. / Driveway South U + + + + Acceptable LOS for alternative analyzed Mitigation improvements for congested intersections are discussed in the following Recommendations section. Regarding bike and pedestrian facilities, there are limited facilities in the immediate vicinity of the project site. Pedestrian facilities are provided and bikes are accommodated via the paved shoulder along Hwy 2 east of Craig Rd. Pedestrian and bike facilities are provided along much of the roadway network within the developed portions of Airway Heights to the east of the project site. 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. Operational analysis results for the various scenarios analyzed are summarized in the tables at the end of the Executive Summary. Recommendations Mitigation recommendations are summarized below for each project alternative. At locations where traffic signalization is recommended, a signal warrant analysis was performed 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; the project proportional share was calculated by dividing the project generated traffic volume by the total intersection traffic volume. West Plains Development – Spokane Tribe Page | 4 Traffic Impact Analysis April 28, 2011
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) 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) 2019 (Phase 3) 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: 34.3% Resulting LOS & Delay (sec): D/52.7 / D/47.4 (roundabout) West Plains Development – Spokane Tribe Page | 5 Traffic Impact Analysis April 28, 2011
Page 1 and 2: APPENDIX D TRAFFIC IMPACT ANALYSIS
Page 4 and 5: TABLE OF CONTENTS 1. EXECUTIVE SUMM
Page 6 and 7: Table 7. Alternative 1 - PM Peak Ho
Page 8 and 9: • 10,480-square-foot Tribal Cultu
Page 12 and 13: Hwy 2 / Lundstrom: Restripe and wid
Page 14 and 15: 2032 Alternative 2 Mitigations (in
Page 16 and 17: Table ES- 2. Operational Analysis S
Page 18 and 19: 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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6.1.2 ALTERNATIVE 1 - 2015 Phase 2
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6.1.4 ALTERNATIVE 1 - MITIGATION Th
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Listed below are improvements recom
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6.1.5 ALTERNATIVE 2 - 2012 Buildout
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MITIGATION-ALT 2, CONTINUED 2012 PM
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6.1.8 ALTERNATIVE 3 - MITIGATION Th
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The Spokane Tribe should work with
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Table 22. Level of Service for 2032
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Alternative 3 is projected to gener
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2032 Alternative 2 Mitigations:
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8. CONCLUSIONS Based upon the techn
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9. RECOMMENDATIONS Mitigation recom
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Hwy 2 / Hayford: Optimize signal ti
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Hwy 2 / Fairchild AFB: Modify signa
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APPENDIX A TRAFFIC COUNT DATA Appen
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PROJECT: West Plains Development DA
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1 PROJECT: DAVID EVANS and ASSOCIAT
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PROJECT: Project Location INTERSECT
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Pipeline (Year 2012) 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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