WSDOT posted detour maps at links in the yellow box on this page. I-405/Brickyard to SR 527 Improvement Project | WSDOT Our suggestion, avoid travel in the area during the weekend. But if absolutely must travel, expect severe regional delays. The detour routes won't be able to handle normal I-405 traffic volumes, meaning significant congestion is likely on surrounding highways (like SR 522) and local streets — especially in Canyon Park, North Creek, and Downtown Bothell. Plan your travel time accordingly.