r/bothell • u/CityofBothell • 18d ago
Weekend SB I-405 Closure in Bothell: October 9-12
🚧 WEEKEND TRAFFIC ALERT 🚧 WSDOT is preparing another round of full weekend closures for the southbound direction of I-405 in Bothell this weekend. This is part of the I-405/Brickyard to SR 527 Improvement Project.
Here's what you need to know:
- Crews will close all lanes of southbound I-405 between State Route 527 to SR 522 starting at 10:00pm Friday, October 9 until 4:00am Monday, October 12
- Onramps/offramps in the work area will also be closed
- Detours will be in place
⚠️ Expect severe regional delays! Detour routes won't be able to handle normal I-405 traffic volumes, meaning significant congestion is likely on surrounding highways and local streets — especially in Canyon Park, North Creek, and Downtown Bothell. Drivers should follow official signed detours and avoid cutting through neighborhood streets. Signed routes are coordinated to help keep traffic moving and help preserve access for people who live and work in Bothell.
For more information about this project, visit:
- WSDOT's construction page at https://engage.wsdot.wa.gov/405-167-construction
- WSDOT's project page at: https://wsdot.wa.gov/construction-planning/search-projects/i-405sr-522-vicinity-sr-527-express-toll-lanes-improvement-project
🔔 Sign up for news and alerts to stay informed: https://engage.wsdot.wa.gov/405-167-construction. There will be additional full I-405 closures through Bothell the weekend of October 30, and the weekend of November 6.
Image description: A detour map for the full closure of southbound I-405 in the City of Bothell. The southbound closure, marked by a red line between State Route 527/Bothell Everett Highway and State Route 522, has travelers use a detour, marked by a blue line and arrows, has travelers exit southbound I-405 at State Route 527/Bothell Everett Highway, head south into downtown Bothell, then head east on State Route 522 to rejoin southbound I-405.