As shared by the Washington State Department of Transportation (WSDOT), the westbound Interstate 90 off-ramp to State Route 18 will close from 5 a.m. to 3 p.m. Saturday, January 17, to repair potholes and repave portions of the ramp near Snoqualmie.
A signed detour will direct drivers to use westbound I-90 and loop around at Southeast High Point Way (exit 20) returning eastbound on I-90 to the exit to SR 18 and Snoqualmie Parkway. People driving in the area should expect delays and increased traffic along the detour route and should plan ahead and use alternate routes or allow extra time to travel to their destination.
This work needs dry weather and may be rescheduled.
Improving traffic flow and safety
The I-90/SR 18 Interchange Improvements project built a diverging diamond interchange and widened SR 18 to two lanes in each direction between I-90 and Deep Creek to help improve traffic flow and safety through the busy corridor.
The project is expected to finish in mid-2026. Crews will place a top layer of asphalt and install permanent lane striping along the widened section of SR 18, through the diverging diamond and on the I-90 on- and off-ramps once weather dries and warms next spring.
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.