SR 18 - Weyerhauser Way to SR 164 - Barrier Replacement

Project news

  • This project will advertise for competitive bidding in spring 2020.
  • Construction will begin during late spring/early summer 2020.
  • This work requires overnight lane reductions, but no full highway closures.
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In 2020, WSDOT will spend $2 million to replace aging concrete barriers separating eastbound and westbound travelers on State Route 18 between Weyerhauser Way South and SR 164 in Auburn.

Needs & Benefits

More than 100,000 drivers use this section of State Route 18 every day. The barrier currently separating the eastbound and westbound lanes has outlived its useful life. Many barrier bases and connective parts are broken or rusted. Broken pieces could present a hazard in the event of a major collision. The new barriers meet current crash testing criteria.


  • Spring 2020: Advertise for competitive bidding.
  • Late spring/early summer 2020: Median barrier installation begins.
  • Fall 2020: Median barrier installation complete.


This project is estimated to cost $2 million. Funding will come from federal and state sources.


Tom Pearce
WSDOT Communications
Phone: 206-440-4696 

Thumbnail map of project area