SR 520 closed between Montlake Blvd. and I-5 in Seattle overnight April 25 Date: April 25, 2026 to April 26, 2026 Time: 9 p.m. Saturday to 9 a.m. Sunday Activity details: Full highway closureHigh-impact construction Impact type: NighttimeOvernightTraffic Description: Crews will use this closure to temporary relocate utilities across the mainlines. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: Both directions of SR 520 between Montlake Boulevard and I-5 in Seattle will close for construction beginning at 9 p.m. on Saturday, April 25, until 9 a.m. on Sunday, April 26. During this time all westbound SR 520 traffic coming across Lake Washington will exit at either Montlake or Lake Washington Boulevards. Traffic from I-5 wanting to access eastbound SR 520 must use alternate routes. SR 520 and the SR 520 Trail remains open across Lake Washington. It is only the section of SR 520 between Montlake and I-5 that will close. Closures today Boyer Ave. E. between E. Roanoke St. and Everett Ave. E. reduced to a single lane Feb. 18 – May 1 Upcoming closures Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly April 21-23 & 27-30 Boylston Avenue E. between E. Roanoke St. and E. Louisa St. closed April 20-22 nightly SR 520 closed between Montlake Blvd. and I-5 in Seattle overnight April 25 Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
