40th Ave / SR 531 (172nd ST) Intersection
The City of Arlington will be installing a traffic signal at the intersection of 40th Ave and SR 531 with a solid median between 43rd Ave and Smokey Point Blvd. Specific project components include traffic signal with protected left-turn movements, ADA compliant pedestrian crosswalks, enhanced intersection lighting, replacement of left turn lane with solid median for corridor safety, and bus stop pull outs.
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- Enhance pedestrian safety
- Improve traffic safety and mobility
- Add bus stops
Project Cost and Funding
- Engineer’s Estimate: $1,845,515
- Project Cost: $1,817,509
- Washington State Transportation Improvement Broad Grant: $1,120,000
- City of Arlington funds: $697,509
- Design: Spring-Fall 2020
- Estimated bid time: Summer 2021
- Construction: April 2022
Community Outreach & Coordination
Regular schedule updates will be provided by the city to keep local businesses and community apprised of the project progress and any potential impacts.
If you have questions or concerns on this project, please contact the City Project Hotline at 360-403-3544 or firstname.lastname@example.org.
- TIB Award Letter
- Conceptual Plan 1
- Conceptual Plan 2
- Channelization Plan
- Project Flyer
- Project Summary
- Certified Bid Tab
- Phase 2 Map
- North side 172nd St Business Access
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- Design contract awarded to Perteet Engineers
- Interactive Webpage: https://bit.ly/40thAveIntersection
- August 31, 2021 - Bid Opening
- September 21, 2021 - Bid Awarded to Interwest Construction
- March 23, 2022 - Estimated construction start date is April 4, 2022.
- May 6, 2022 - Next week work will continue on the installation of the electrical conduit, fine grading for the curb and sidewalk on the SE corner, and begin formwork for curb and sidewalk on the NW, NE and SW corners. Left turns heading north from 40th Ave onto 172nd St will be prohibited while this work is being completed. Please expect delays in travel times and continue to drive slowly through construction zones for everyone’s safety.
- May 13, 2022 - Next week work will continue with the electrical conduit installation. All traffic movement will be open at the intersection of 40th and 172nd St. Please continue to expect delays in travel times.
- May 20, 2022 - Next week work is scheduled for Monday through Thursday during the night hours of 7:00 PM to 7:00 AM. Work will include the relocation of an existing fire hydrant, initial paving, and median removal. Please expect delays in travel times along with short lane closures when the work area is changing.
- May 27, 2022 - Next week work is scheduled for Tuesday through Friday during the hours of 7:00 AM to 7:00 PM, no work will occur on Monday in honor of Memorial Day. Work will include the paving of the bus turnouts and sidewalks on all 4-corners of the intersection.
- June 3, 2022 - Next week work is scheduled for Monday through Friday during the hours of 7:00 AM to 7:00 PM. Work scheduled will include the paving of the bus turnouts and concrete pouring for sidewalks on all four corners of the intersection, continue paving sidewalks and gutters, and electrical. Please expect delays in travel times and drive slowly through construction zones.
- June 16, 2022 - Next week work will continue Tuesday-Thursday during the night hours of 7:00 PM to 7:00 AM and Tuesday to Friday during the hours of 7:00 AM to 4:00 PM. Night work will include continued median and roadway excavation and daytime work will include the new median construction. Traffic will move to outside lanes in the construction area while the median is constructed, please see Phase 2 Map above.
- June 24, 2022 - Next week the contractor will not be on site. They will return the week of July 5th during the night hours of 7:00 PM to 7:00 AM.
- June 30, 2022 - Next week the contractor will not be on site. They will return the week of July 11th during the night hours of 7:00 PM to 7:00 AM and the day hours of 7:00 AM to 4:00 PM.
- July 15, 2022 - Next week work will continue with the irrigation installation and construction of the center stamped concrete median. Work is scheduled to occur Monday – Friday from 7:00 AM to 7:00 PM.
- July 22, 2022 - Next week work will continue with roadway paving, Irrigation installation and landscaping. Work is scheduled to occur Monday – Thursday during the night hours of 7:00 PM to 7:00 AM.
- July 29, 2022 - Next week work will include concrete work in the center median and sidewalk, electrical work, and landscaping.
- August 12, 2022 - Next week work will include installation of signal loops, and center median concrete work.
- August 19, 2022 - Next week work will include continued center median concrete work, median landscaping and irrigation, and installation of vehicle detection loops.
- August 26, 2022 - Next week no work is scheduled at this time. This is subject to change depending on landscape material.
- September 2, 2022 - Next week work will include center median landscaping, irrigation, and possible electrical work for signal system. All electrical work is dependent on material arrival. Construction is scheduled to occur Tuesday – Friday between 7:00 AM and 7:00 PM.
- September 9, 2022 - Next week work will continue with the center median landscaping and electrical work for the signal system. Construction is scheduled to occur Monday – Friday between 7:00 AM and 7:00 PM.
- September 16, 2022 - Next week no work will occur due to material delays. Construction will resume the week of the 26th.
- September 23, 2022 - Next week work will include paving, median demolition, and the installation of the signal arms. The remaining left hand turn pockets west of 40th Ave will be eliminated. Please see detour route to access the businesses on the north side of 172nd St. until the signal is active. Paving and roadway work is scheduled during the night hours of 7:00 PM to 7:00 AM. All other work will occur during the daytime hours of 7:00 AM to 7:00 PM.