SR 18 widening brings smoother, safer travel for commuters, freight haulers, and families
- Greater Issaquah Chamber of Commerce
- Oct 27, 2025
- 1 min read
After years of planning, construction, and patience from our communities, the newly widened stretch of SR 18 between I-90 and Deep Creek is now open, bringing smoother, safer travel for commuters, freight haulers, and families — now with two lanes in each direction!
This milestone marks major progress in the I-90/SR 18 Interchange Improvements project, which is designed to improve safety and traffic flow along one of our region’s busiest corridors. The newly opened lanes remove a long-standing bottleneck near Snoqualmie that caused heavy congestion and safety concerns for years.
The project also includes new four-lane bridges that improve fish passage along Lake Creek and Deep Creek, and a new bridge over Raging River. The diverging diamond interchange, which opened earlier this summer, is now fully integrated with the expanded roadway, and WSDOT will continue its monitoring work in the coming weeks and months.
While construction will continue into 2026 for final paving, landscaping, and finishing touches, this is a huge step forward for our region’s commuters, freight haulers, and families who rely on SR 18 every day.
We’re deeply grateful to the Washington State Department of Transportation, contractor crews, local governments, law enforcement, emergency services, and all the community members who have shown patience and partnership throughout this complex project.
Learn more about the project and upcoming work:
We’re proud to see this progress benefiting our communities — and we’ll keep working to ensure East King County gets the safe, efficient infrastructure it deserves.
Sincerely,
Rep. Lisa Callan
Rep. Zach Hall
Improving infrastructure like SR 18 is vital for regional growth and commuter safety. While waiting for construction to wrap up, those who enjoy retro tech might appreciate the classic titles available at ArcadeGameBox. It is great to see investments being made that improve the daily quality of life for so many families.
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Finally, two lanes each way on SR 18—this is a game-changer for the daily grind between I-90 and Deep Creek. The smoother flow for freight haulers alone should ease a lot of bottleneck frustration, and I'm curious to see how the interchange improvements hold up during peak hours. I've been tracking the progress with https://grabcad.site
Two lanes each way on SR 18 is a huge win for anyone who’s sat through the I-90 merge bottleneck—this should finally take the edge off those afternoon backups for commuters and freight alike. Curious to see how the next phase of the interchange project shapes up, and I’ve been tracking the latest updates over at https://ai-songgenerator.com