News Flash

As reported by the Washington State Department of Transportation, the I-90/SR 18 Interchange Improvements project near North Bend and Snoqualmie has some important traffic changes taking place beginning the week of August 21 as crews finish the west half of Lake Creek bridge on State Route 18, just south of Interstate 90.

An overnight traffic shift on SR 18 near Lake Creek bridge will take place just south of I-90 and SE 104^th Street. WSDOT will move the work zone to the east side of the road to finish Lake Creek bridge and will shift travel lanes over the finished half of the bridge. People using SE 104^th Street will have the same access as the previous traffic shift.

• From 9 p.m. to 5 a.m. each night, Monday, August 21 and Tuesday, August 22, flaggers will alternate traffic while they perform the shift. 
• This configuration will last for several months until bridge work is finished. 
• By fall 2024, SR 18 widening will be complete, and a dedicated left turn lane will be reinstated for SE 104^th Street.

An overnight eastbound I-90 on-ramp closure

• From 9 p.m. Tuesday, August 22 to 5 a.m. Wednesday, August 23 to prepare for culvert installation
• Detour using WB I-90 and Exit 22 in Preston to access eastbound I-90

An around-the-clock closure of the eastbound I-90 on-ramp from SR 18 

• From 9 p.m. Friday, August 25 through 5 a.m. Monday, August 28 for culvert installation beneath the roadway
• Detour using WB I-90 and Exit 22 in Preston to access eastbound I-90

Lowered speed limits started Monday, August 7

WSDOT lowered speed limits on State Route 18 just northeast of the Tiger Mountain summit to help protect highway construction crews and people traveling through the work zone. Speed radar signs may be posted before the beginning of the school year to remind drivers to slow down.

1. A revised speed limit of 30 mph begins at the I-90 interchange and end at milepost 27.5, just south of Southeast 104^th Street.
2. A revised speed limit of 45 mph begins at milepost 27.5, just south of Southeast 104^th Street, and ends at milepost 23.8, just north of the Tiger Mountain summit. 

You can learn more about these changes in WSDOT’s August 2 press release: bit.ly/SR18-Speed-Reduced-Snoq

Schedules are subject to change. Ongoing lane closures occur each night, Mondays through Thursdays, between the interchange and Lake Creek. WSDOT will continue to post updates to subscribers of the I-90/SR 18 project and King County email lists. Commuters can find real-time traffic information on their regional travel map and by following the WSDOT Traffic Twitter (X) account.