The SR 520 Bridge Replacement and HOV Program is rebuilding one of the Puget Sound region's busiest highway corridors. We’re replacing vulnerable bridges, improving traffic safety, enhancing regional mobility and providing new and better options for nonmotorized travel.

State Route 520 (SR 520) is a state highway and freeway in the Seattle metropolitan area, part of the U.S. state of Washington. It runs 13 miles (21 km) from Seattle in the west to Redmond in the east.

SR 520 Construction Corner The go-to source for information on SR 520 construction and closures. Want to know about current or upcoming SR 520 construction closures and activities? You’ve come to the right place. Use the interactive map below to filter by date range, location, and closure type to find detailed information as it is available.

Monitor traffic and weather conditions on SR 520 between Redmond and Seattle with real-time camera images from WSDOT.

The SR 520 Bridge Replacement and HOV Program enhances travel safety and mobility with modern, structurally stronger bridges, as well as substantial transit and roadway improvements along this urban corridor. Built in stages, the improvements extend from I …

Find out how to pay tolls and what the toll rates are for the SR 520 Bridge. Tolling on the SR 520 Bridge helps manage congestion and is expected to raise $1.2 billion to help pay for the construction, safety and maintenance of the new bridge. You have two options to pay a …

The Montlake Project will improve transportation for both motorized and nonmotorized travel along the corridor with a new SR 520 eastbound bridge over Union Bay. This project also builds a new, three-acre lid covering the highway in Montlake that …

Feb 18, 2025 · Description: Crews will test Montlake Lid systems. Traffic: SR 520 will close across Lake Washington between the eastside and I-5 for westbound traffic and between Montlake …

State Route (SR) 520 is one of two major east-west roadways crossing Lake Washington, located within King County and the Seattle metropolitan area in the State of Washington. It connects …

Nov 6, 2017 · The “Montlake Phase” is one of several projects programmed to replace windstorm- and earthquake-vulnerable structures as well as to improve mobility for people and commerce across Lake Washington and through the SR 520 corridor from Seattle to Redmond.