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Washington State Department of Transportation
Northwest Region – 15700 Dayton Ave N - Shoreline, WA 98113 – 206-440-4000
TRAVEL ADVISORY
Oct. 2, 2026
Contact: Eric Zackula, communications, 206-440-4483
Weekday westbound SR 18 lane reduction starts Monday, Oct. 5, at Tiger Mountain summit
SNOQUALMIE – The right lane of westbound State Route 18 will close from 8 a.m. to 2 p.m. Monday through Thursday for about three weeks starting Monday, Oct. 5, just east Tiger Mountain summit.
Crews working for the Washington State Department of Transportation will perform sampling work along westbound SR 18 between mileposts 24 and 25 in support of the future SR 18, Issaquah Hobart Rd to Deep Creek Vicinity – Widening & Fiber project. One westbound lane will remain open each day during sampling work, which is planned through Oct. 22.
Travelers should expect delays and allow extra travel time during these daily lane reductions.
Real-time travel information is available via the WSDOT mobile app, the WSDOT Travel Center Map or by signing up for WSDOT's email updates
Hyperlinks within the release:
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WSDOT keeps people, businesses and the economy moving by operating and improving the state's transportation systems. To learn more about what we're doing, go to www.wsdot.wa.gov/news for pictures, videos, news and blogs. Real-time traffic information is available at wsdot.com/traffic.
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