I-405 peak shoulder construction
Construction crews working for the Washington State Department of Transportation will begin pre-construction activities on the Interstate 405 Northbound Peak-Use Shoulder Lane Project this week. Drivers may see daytime shoulder closures as crews clear brush and trim trees to prepare for installing electronic lane control signs and building a new noise wall.
The project will build a new peak-use shoulder lane, which will add new capacity to general purpose lanes from SR 527 to I-5. The new lane is anticipated to open this spring.
When this project is complete, drivers and buses will be able to use the right shoulder as an additional general-purpose lane during times with the heaviest congestion—in this case, the weekday afternoon commute. Overhead signs will alert drivers to when the lane is open. For more information and the latest construction-related closure information, please visit the project website.