Drivers should anticipate nightly detours this week on State Route 18 between Weyerhaeuser Way South and Interstate 5 as crews close all lanes to remove brackets and forms used build new concrete flyover ramps.
Tuesday and Wednesday nights, Jan. 3 and 4, the work will affect westbound SR 18 traffic. Crews will close a single lane of SR 18 at 9 p.m., and at the same time will close the northbound I-5 off-ramp to westbound SR 18. The westbound roadway will completely close at 11 p.m. Drivers will follow marked detours to connect to both directions of I-5. Crews will reopen a single lane of SR 18 to traffic each day at 4 a.m. The ramp and all lanes will reopen by 5 a.m. in time for the morning commute.
Thursday, Jan. 5, will be a little different as crews close all lanes of eastbound SR 18 from I-5 to Weyerhaeuser Way South. The plan calls for a single lane of SR 18 to close at 9 p.m., along with the southbound I-5 off-ramp to eastbound SR 18. All lanes of SR 18 will close by 11 p.m. while crews are working above the highway. At 4 a.m., a single lane of SR 18 will reopen to traffic. The ramp and all lanes will be open to traffic by 5 a.m.
The work is part of the $112.5 million I-5 – SR 161/SR 18 Triangle Improvements project, which will help eliminate weaving vehicle movements from those interchanges.
For more information on construction closure for this project, please see our Northwest Construction page.
Drivers can monitor real-time road conditions and look at traffic cameras by checking theSeattle traffic map.
WSDOT will post real-time traffic updates on the Travel Alerts page, and on Twitter.
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