Appendix D Traffic Impact Analysis - westplainseis.com

MITIGATION-ALT 3, CONTINUED
INTERSECTION
2012 PM Peak
BG + Alt3
2032 PM Peak
BG + Alt3
Hwy. 2 /
--
LOS = E
Fairchild AFB Delay = 71.4
Optimized Signal Timing, Add NB Lt turn
bay and WB through lane
--
LOS = D
Delay = 48.9
Hwy. 2 / CM = SBL CM = SBL
Dwy. Middle LOS = F LOS = F
Signalized
Roundabout
Delay = * Delay = *
LOS = C
LOS = D
Delay = 29.3 Delay = 40.3
LOS = A
LOS = D
Delay = 9.2 Delay = 60.0
Listed below are improvements recommended for consideration to reduce traffic impacts associated with
the subject project. The project’s recommended proportional share contribution for 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 (Alt. 3 Buildout) 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: 30.2%
Resulting LOS & Delay (sec): C/28.2 / A/7.1 (roundabout)
Hwy 2 / Hayford: Optimize signal timing and convert the inside SB thru lane to a 2 nd SB left
turn lane.
Project Proportional Share: 13.6%
Resulting LOS & Delay (sec): D/40.6
Craig / SR 902: Install traffic signal; alternatively, consider installation of a roundabout
Project Proportional Share: 20.6%
Resulting LOS & Delay (sec): B/15.1 / A/8.2
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): C/29.3 / A/9.2 (roundabout)
6.2 Bike, Pedestrian and Transit Facilities
The traffic impacts of the project are not expected to have significant negative impact on non-motorized
users. The addition of frontage improvements as discussed below will enhance bike and pedestrian
facilities and accommodation adjacent to the project site.
It is recommended that the project install pedestrian (sidewalks or trails) and bike lanes along Hwy 2 and
Craig Rd. project site frontages according applicable requirements of WSDOT, City of Airway Heights
and Spokane County and to comply with local bike/pedestrian plans developed by the City of Airway
Heights in the vicinity of the project.
West Plains Development – Spokane Tribe Page | 74
Traffic Impact Analysis April 28, 2011