Starting on Monday, May 8, 2023, and continuing for several weeks, the Washington State Department of Transportation (WSDOT) will intermittently close the left lane of westbound I-90 between Preston and High Point.
These intermittent closures will occur from 9 am to 7 pm along this three-mile stretch of I-90 so that crews can perform utility work required for the I-90/SR 18 Interchange Improvements project.
Additional Lane Closures on SR 18 for highway widening
Monday – Thursday from 9 pm to 5 am, drivers using SR 18 should prepare for lane shifts and nighttime traffic flagging operations for lane closures between the I-90/SR 18 interchange and Deep Creek. This work is related to the widening of SR 18 to two lanes in each direction.
Drilling crews are also working on eastbound SR 18 from 9 am to 4 pm and will close a single lane between Issaquah/Hobart Road and the summit of Tiger Mountain to gather samples for a project in design.
WSDOT I-90/SR 18 Improvements Project
The interchange improvement project will build a diverging diamond interchange and widen SR 18 between I-90 and Deep Creek. Construction started in summer 2022 and is expected to be complete in 2025.