Skip Top Navigation

Project Info

State Route 522 Widening Improvements - Corridor Map

State Route 522 (SR 522) is an important east-west route that runs from I-5 in Seattle to US 2 in Monroe. Significant population growth has resulted in severe congestion on SR 522, especially during the morning and afternoon commute.

SR 522 improvement projects will dramatically enhance safety and help decrease drive times on this highly congested roadway.  When all planned projects on SR 522 are completed, drivers will have two lanes in each direction (including widened bridges), two new interchanges and numerous safety improvements. The environment will also benefit from new drainage facilities that will help improve water quality.