Appendix D Traffic Impact Analysis - westplainseis.com

HWY 2 / West Site Access: B/11.0
• Craig Rd. - HWY 2 to 6 th Ave.: Widen Craig Rd. and provide site access intersection
improvements as assumed and identified in the TIA. Construction frontage improvements along
the Spokane Tribe site frontage. Widen road to accommodate a three lane roadway section and
bike lanes; approximately 45-50ft depending on the ultimate design level determination of
appropriate lane widths. Construct site access driveways as indicated in the site plan and such
that no access aligns with 12th Avenue.
Craig Rd/SR 902: Construct or fully fund construction of either a traffic signal and related
intersection improvements or a roundabout. (Note the proportional share responsibility for the
was calculated as 23.7% in the TIA)
Resulting LOS & Delay (sec): B/15.6 / A/8.6 (roundabout)
HWY 2/Hayford Rd.: Commit to funding a proportional share (based on project and phase
generated traffic) to improvements to the 21 st Ave./18 th Ave. corridor at the time of construction
of said improvements (See further discussion of HWY2/Hayford mitigation in the previous
section).
6th Street: In the event that the 6th Street extension (near and east of Craig R.) is not completed
prior to project implementation, the Tribe shall fully fund development of the unfinished portion
of the 6th Street extension from approximately South Aspen Street to Craig Road. The City shall
enter into an agreement with the Tribe to reimburse the Tribe for cost of development of the 6th
Street extension through development of local traffic impact fee assessment areas.
12th Avenue: The Tribe shall fully fund the posting of signage for the eastbound traffic on 12th
Avenue and Craig Road stating “Local Access Only” or provide other similar means of
discouraging the use of 12 th Ave. by Spokane Tribe site traffic. 12th Avenue shall be considered
within the future traffic impact analysis described under Traffic Mitigation Measure B. If the
results of the updated TIA determine that the traffic mitigation identified for 12th Avenue should
be adjusted due to changes in future traffic background conditions, the recommendations shall be
subject to review and approval by the City prior to any modifications to the traffic mitigation
plan.
By fully funding HWY 2/Craig and Craig/SR 902 improvements the Spokane Tribe project is
contributing substantially beyond the impact created by the project. The amount beyond the
project’s proportional responsibility should be credited towards future off-site mitigations identified
in future phases.
Additionally, the City of Airway Heights has established a traffic mitigation fee to fund
improvements at the HWY 2/Craig intersection. Funds collected to date should be used to reimburse
the Spokane Tribe for its design and construction expenses related to this intersection. Furthermore,
it is recommended that the City of Airway Heights collect late comers traffic impact fees for this
intersection as reimbursement to the Spokane Tribe for funding and construction beyond their
proportional responsibility.
2015 (Phase 2) Mitigations:
Hwy 2 / Craig: Improvements constructed as Phase 1 mitigation.
Resulting LOS & Delay (sec): B/12.4
Hwy 2 / Lundstrom: Restripe and widen approaches to accommodate exclusive NB and SB right
turn lanes.
West Plains Development – Spokane Tribe Page | 5
Traffic Impact Analysis Addendum July 18, 2011