Westbound SR 520 off-ramp to northbound I-5 and East Roanoke Street closed nightly Oct. 5-8, Oct. 19-22, & Oct. 26-29 Date: Oct. 5, 2026 to the morning of Oct. 30, 2026 Time: 10 p.m. to 6 a.m. weeknights Activity details: Street and lane closureRamp closure Impact type: OvernightTrafficNoise Description: Crews will use these closures to facilitate excavation near the off-ramps. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: The westbound SR 520 off-ramp to both northbound I-5 and East Roanoke Street will close for construction nightly from 10 p.m. to 6 a.m. on select weeknights beginning Monday, Oct. 5, until the morning of Friday, Oct. 30. During these closures, all westbound SR 520 traffic that remains on westbound SR 520 past the Montlake Blvd. exit will detour to southbound I-5. In addition, a single right lane on westbound SR 520 between Montlake and I-5 will also close during these dates and hours. The ramp and lane will reopen at 6 a.m. each of the following mornings. Please note: Crews will excavate this area only during daytime hours. The nightly ramp closures are for the trucks to have the necessary space to load the excavated soil and haul it away. Closures Eastbound SR 520 off-ramp to Montlake Boulevard closed nightly Oct. 12-15 Westbound SR 520 off-ramp to northbound I-5 and East Roanoke Street closed nightly Oct. 5-8, Oct. 19-22, & Oct. 26-29 Boyer Ave. E. between E. Roanoke St. and Everett Ave. E. closed nightly Oct. 12-15 Montlake Boulevard on-ramp to westbound SR 520 closed nightly Oct. 13-14 Southbound I-5 off-ramp to eastbound SR 520 closed overnight Oct. 14 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 – Oct. 23 (excluding weekends) Activities Portage Bay piledriving schedule: Week of Oct. 12-18 Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
