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Washington State Department of Transportation
Northwest Region – 15700 Dayton Ave N - Shoreline, WA 98113 – 206-440-4000
TRAVEL ADVISORY
Sept. 18, 2026
UPDATE: The overnight eastbound State Route 18 closure at Issaquah-Hobart Road Southeast has been extended an additional overnight from 9 p.m. Wednesday, Sept. 30 to 5 a.m. Thursday, Oct. 1.
Contact: Eric Zackula, communications, 206-440-4483
Overnight eastbound SR 18 closures at Issaquah-Hobart Road Southeast start Monday, Sept. 21
SNOQUALMIE – All lanes of eastbound State Route 18 from Issaquah-Hobart Road Southeast (milepost 20) to Deep Creek (milepost 26) will close nightly from 9 p.m. to 5 a.m. for six nights between Monday, Sept. 21, and Tuesday, Sept. 29. Closures are not scheduled from Friday, Sept. 25 to Sunday, Sept. 27.
This work is for surveying for the SR 18, Issaquah Hobart Rd to Deep Creek Vicinity – Widening & Fiber project.
Travelers should expect delays, allow extra travel time and seek alternate routes during the nightly closures . Issaquah-Hobart Road and Issaquah city streets are not suitable for freight traffic and semi-trucks and should not be used as a detour for trucks. Freight traffic should use westbound SR 169 to northbound I-405 and then use northbound I-405 to eastbound I-90, or other suitable alternate state routes.
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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