Westbound I-90 Off-Ramp to SR 18 to Close Thursday Night, February 6th

The westbound I-90 off-ramp to State Route 18/Snoqualmie Parkway is scheduled to close from 9 p. m. on February 6 to 5 a. m. on February 7, 2025, significantly affecting local traffic patterns in the Snoqualmie region.

This closure is part of the Washington State Department of Transportation's ongoing I-90/SR 18 Interchange Improvements project, which aims to enhance safety and infrastructure at this busy junction. During the closure, contractor crews will secure concrete barriers and install a culvert to accommodate future roadway upgrades. Drivers should expect to follow a signed detour that leads them to exit 22 and back to the eastbound off-ramp to minimize disruptions. The improvements will ultimately widen more than two miles of SR 18 to two lanes in each direction south of I-90, enhancing traffic flow. With the new diverging diamond interchange anticipated to open in late spring or summer 2025, these changes are expected to significantly improve safety and efficiency.

For those needing real-time travel updates, the WSDOT mobile app and website provide timely information. Local commuters are encouraged to plan ahead and stay informed to avoid delays.