Both directions of the roadway will be closed as part of a project to improve a crowded interchange.
SNOQUALMIE, Wash. — Interstate 5 isn’t the only major western Washington roadway that will be closed this weekend.
State Route 18 will be closed in both directions under the Interstate 90 bridges until 5 a.m. on July 25. The closure began Thursday night at 9 p.m. and will run a total of eight days.
The closure is part of the I-90/SR 18 Interchange Improvements project. In an effort to improve traffic flow, the Washington State Department of Transportation (WSDOT) is building a diverging diamond interchange and
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