Westbound SR 520 between Montlake Blvd. and I-5 closed nightly Aug. 10-13 Date: August 10, 2026 to August 13, 2026 Time: 11 p.m. to 5 a.m. nightly Activity details: Full highway closure Impact type: NighttimeOvernightNoise Description: Crews will use this closure to re-stripe parts of the roadway near the exit ramps to I-5 and East Roanoke Street. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: Westbound SR 520 between Montlake Boulevard and I-5 in Seattle and all associated on- and off-ramps will close for construction nightly beginning at 11 p.m. until 5 a.m. August 10 – 13. All westbound SR 520 traffic coming from the eastside must exit at either Montlake or Lake Washington boulevards during the hours this section of SR 520 is closed. Eastbound SR 520 is not affected by this work and will remain open. Closures Montlake Blvd. between E. Louisa St. and E. Roanoke St. reduced to one lane in each direction July 22-24 Westbound SR 520 between Montlake Blvd. and I-5 closed nightly Aug. 10-13 Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly Aug. 11 & 12 Long-term closures Weekday parking restrictions near Fuhrman Ave. for staging site begin June 15 Boyer Avenue East reduced to a single lane between East Roanoke Street and Everett Avenue East July 20 – September 1 (excluding Sundays) Single lane on eastbound SR 520 between I-5 and Montlake Blvd. closed nightly July 22 – September 1 (excluding Sundays) Activities Vibratory casing installation in Portage Bay schedule: Week of July 20-26 Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
