ALERT: Eastbound SR 520 closed between I-5 and Montlake May 8-11

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Did you know? HOV on SR 520 requires three or more people — not two. Fines start at $186.

Learn more about the HOV rules

Montlake Project

Aerial view looking west at the recently completed SR 520 Montlake lid and interchange. In the background, construction is underway on the new Portage Bay Bridge.

Completed in 2025, the Montlake Project improved transportation for motorized and nonmotorized travel along the SR 520 Corridor. It built a new earthquake-resilient eastbound bridge over Union Bay, a three-acre landscaped lid with regional transit stops, and almost a mile of new trails, including a 73-foot-wide, bicycle and pedestrian bridge over SR 520.

Montlake Project Webpage

Construction photos

SR 520 - Montlake Connection Project
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