Eastbound SR 520 off-ramp to Montlake Boulevard closed around-the-clock Sept. 12 – 19 Date: Sept. 12, 2026 to Sept. 19, 2026 Time: 4:30 p.m. on Sept. 12 until 8 a.m. on Sept. 19 Activity details: Ramp closureHigh-impact construction Impact type: Around-the-clockTrafficNoise Description: Crews will use this around-the-clock closure to remove portions of the old eastbound SR 520 off-ramp to Montlake Boulevard. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: The eastbound SR 520 off-ramp to Montlake Boulevard in Seattle will close for construction beginning at 4:30 p.m. on Saturday, Sept. 12 and remain closed around-the-clock until 8 a.m. on Saturday, Sept. 19. During the closure, crews will use the new temporary off-ramp to stage equipment needed to begin removing portions of the old off-ramp closed back in June. Crews need to remove the old ramp to make space for another traffic shift coming in early 2027. What you need to prepare for: This around-the-clock ramp closure will have significant impacts for travelers needing to access Montlake Boulevard from I-5 and will require an adjustment to their travels. For those wanting to access the University of Washington or the UW Medical Center, you will need to take a different route. If you choose to enter eastbound SR 520 from I-5, you will cross Lake Washington and then would need to turn around and take westbound SR 520 to exit at Montlake. Please note this will result in you paying the SR 520 Bridge Toll twice. Potential alternate routes to Montlake from I-5 include: Northbound I-5 travelers Take the Lakeview Boulevard exit, just south of the exit to eastbound SR 520 and head east. Continue north on I-5 past the exit to eastbound SR 520 and take the Northeast 45th Street exit and head east. Southbound I-5 travelers Exit at either Northeast 45th Street or Northeast 50th Street on I-5 and head east. Take the Boylston Avenue East exit and head east. Any changes or updates to this work will be shared on this page and in our weekly email updates. Closures Westbound SR 520 off-ramp to northbound I-5 and E. Roanoke St. closed select nights Aug. 19 – Sept. 3 Eastbound SR 520 off-ramp to Montlake Boulevard closed around-the-clock Sept. 12 – 19 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 11 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Westbound SR 520 off-ramp to northbound I-5 and E. Roanoke St. closed select nights Aug. 19 – Sept. 3 Date: Aug. 19, 2026 to Sept. 4, 2026 Time: 10 p.m. to 6 a.m. nightly on the dates mentioned Activity details: Ramp closure Impact type: OvernightTrafficNoise Description: Crews will use these nightly closures to work on shaft installation for the future expansion of the Roanoke Trail Crossing Bridge. This work is part of the SR 520 Portage Bay Bridge & Roanoke Lid Project. Traffic: The westbound SR 520 off-ramp to northbound I-5 and East Roanoke Street will close for construction from 10 p.m. to 6 a.m. on select weeknights beginning Aug. 19 until Sept. 3. The currently scheduled closures dates are the nights of: Aug. 19 – 20 Aug. 24 – 27 Aug. 29 (Saturday) Aug. 31 & Sept. 1-3 Please note these dates can change. We’ll update this page if a closure is canceled or rescheduled. During these closures, all westbound SR 520 traffic that remains on SR 520 past the Montlake and Lake Washington Boulevard exits will detour to southbound I-5. Those who do not want to head southbound on I-5 must exit at Montlake or Lake Washington Boulevard. Closures Westbound SR 520 off-ramp to northbound I-5 and E. Roanoke St. closed select nights Aug. 19 – Sept. 3 Eastbound SR 520 off-ramp to Montlake Boulevard closed around-the-clock Sept. 12 – 19 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 11 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Delmar Drive East between E. Roanoke St. and 11th Ave. E. closed nightly Aug. 12 & Aug. 19-20 Date: Aug. 12, 2026 to Morning of Aug. 21, 2026 Time: 10 p.m. to 6 a.m. nightly on Aug. 12 and Aug. 19-20 Activity details: Street and lane closure Impact type: OvernightTrafficNoise Description: Crews will use these closures to restripe the roadway and adjust barriers around the work zone. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: Both directions of Delmar Drive East between East Roanoke Street and 11th Avenue East will close for construction beginning at 10 p.m. until 6 a.m. nightly on August 12 and on the nights of Aug. 19-20. Signed detours will be in place. Local access will be maintained for residents living near the closure area. Closures Westbound SR 520 off-ramp to northbound I-5 and E. Roanoke St. closed select nights Aug. 19 – Sept. 3 Eastbound SR 520 off-ramp to Montlake Boulevard closed around-the-clock Sept. 12 – 19 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 11 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Eastbound SR 520 between I-5 and Montlake Blvd. closed overnight Aug. 8 Date: August 8, 2026 to August 9, 2026 Time: 7 p.m. Saturday to 11 a.m. Sunday Activity details: Full highway closure Impact type: OvernightTrafficNoise Description: Crews will use the closure to repair an expansion joint on the bridge. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: Eastbound SR 520 between I-5 and Montlake Boulevard will close for construction beginning at 7 p.m. on Saturday, Aug. 8, until 11 a.m. on Sunday, Aug. 9. All traffic from I-5 wanting to head eastbound on SR 520 must use alternate routes. Please note, eastbound SR 520 is open across Lake Washington. It is only the section of eastbound SR 520 between I-5 and Montlake Boulevard that will close. Closures Westbound SR 520 off-ramp to northbound I-5 and E. Roanoke St. closed select nights Aug. 19 – Sept. 3 Eastbound SR 520 off-ramp to Montlake Boulevard closed around-the-clock Sept. 12 – 19 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 11 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly Aug. 11 & 12 Date: August 11, 2026 to August 13, 2026 Time: 10 p.m. to 6 a.m. nightly Activity details: Ramp closure Impact type: NighttimeOvernightTraffic Description: Crews will use this closure to re-stripe sections of the ramp. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: The eastbound SR 520 off-ramp to Montlake Boulevard will close for construction nightly beginning at 10 p.m. until 6 a.m. on Tuesday, August 11 and Wednesday, August 12. All traffic from I-5 entering eastbound SR 520 will pay the SR 520 Bridge Toll during the hours this ramp is closed. Those who do not want to pay the toll or who need to access Montlake from I-5 must use alternate routes. Closures Westbound SR 520 off-ramp to northbound I-5 and E. Roanoke St. closed select nights Aug. 19 – Sept. 3 Eastbound SR 520 off-ramp to Montlake Boulevard closed around-the-clock Sept. 12 – 19 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 11 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Single lane on eastbound SR 520 between I-5 and Montlake Blvd. closed nightly July 22 – September 1 (excluding Sundays) Date: July 22, 2026 to At least September 1, 2026 Time: As early as 8 p.m. until 6 a.m. Mondays through Saturdays Activity details: Street and lane closure Impact type: NighttimeOvernightTraffic Description: Crews will use this closure for dump truck staging in coordination with the single lane closure on Boyer Avenue East for the Boyer Hillside regrade. Traffic: A single right lane on eastbound SR 520 between I-5 and Montlake Boulevard will close for construction nightly beginning as early as 8 p.m. until 6 a.m. Monday through Saturday nights from July 22 to at least September 1. The eastbound SR 520 off-ramp will remain open during these lane closures unless otherwise noted. These lane closures will not be in effect every night and sometimes will have different starting times (e.g. 8 p.m.., 10 p.m., 11 p.m., 11:30 p.m. or 11:59 p.m.). We will do our best to call out unique starting times for proper planning. The lane closure will always end at 6 a.m. Learn more about the Boyer Hillside regrade work on our Portage Bay Major Construction Updates webpage. Closures Westbound SR 520 off-ramp to northbound I-5 and E. Roanoke St. closed select nights Aug. 19 – Sept. 3 Eastbound SR 520 off-ramp to Montlake Boulevard closed around-the-clock Sept. 12 – 19 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 11 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
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 Westbound SR 520 off-ramp to northbound I-5 and E. Roanoke St. closed select nights Aug. 19 – Sept. 3 Eastbound SR 520 off-ramp to Montlake Boulevard closed around-the-clock Sept. 12 – 19 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 11 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Boyer Avenue East reduced to a single lane between East Roanoke Street and Everett Avenue East July 20 – September 11 (excluding weekends) Date: July 20 to Sept. 11 Time: 7 a.m. (starting Aug. 19) to 3:30 p.m. weekdays Activity details: Street and lane closureHigh-impact construction Impact type: DaytimeBike/pedestrianParking RestrictionsTrafficNoise Description: Crews will use this single lane closure to create space for dump trucks to remove nearly 20,000 cubic yards of soil from the Boyer Hillside. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: Boyer Avenue East will be reduced to a single lane between East Roanoke Street and Everett Avenue East beginning at 9:30 a.m. to 3:30 p.m. weekdays beginning Monday, July 20, until at least Friday, Sept. 11. 8/18/26 Update: Please note the single lane closure will start at 7 a.m. until 3:30 p.m. beginning Wednesday, Aug. 19. In addition, there will be parking restrictions on Boyer Avenue East to allow space for crews and traffic to get through. Flaggers will be on site to manage traffic flow and pedestrian access needs. Travelers are advised to plan for delays or seek alternate routes if able. Learn more about the Boyer Hillside regrade on our dedicated project updates page. Closures Westbound SR 520 off-ramp to northbound I-5 and E. Roanoke St. closed select nights Aug. 19 – Sept. 3 Eastbound SR 520 off-ramp to Montlake Boulevard closed around-the-clock Sept. 12 – 19 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 11 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Select SR 520 ramps closed for Revive I-5 construction in Seattle July 10-13 Date: July 10, 2026 to July 13, 2026 Time: As early as 10 p.m. Friday until 5 a.m. Monday Activity details: Ramp closure Impact type: Around-the-clock Description: Due to construction from a nearby project, select SR 520 ramps will be closed over the weekend to facilitate the work. These closures are not part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: Ahead of the upcoming “Revive I-5” weekend closure, travelers should prepare for delays and consider alternate routes due to ramp closures that begin Friday night, July 10, until Monday morning, July 13. For more details on the Revive I-5 project, please visit their website. Ramp closures include: Westbound SR 520 off-ramp to northbound I-5 Westbound SR 520 off-ramp to East Roanoke Street (closing as early as 10 p.m. on July 10) Northbound I-5 on-ramp to eastbound SR 520 (due to mainline I-5 closure) All ramps will reopen by 5 a.m. Monday, July 13. Closures Westbound SR 520 off-ramp to northbound I-5 and E. Roanoke St. closed select nights Aug. 19 – Sept. 3 Eastbound SR 520 off-ramp to Montlake Boulevard closed around-the-clock Sept. 12 – 19 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 11 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Westbound SR 520 off-ramp to northbound I-5 and East Roanoke Street closed overnight July 9 Date: July 9, 2026 to July 10, 2026 Time: 10 p.m. Thursday to 6 a.m. Friday Activity details: Ramp closure Impact type: OvernightTrafficNoise Description: Crews will use this closure to remove graffiti and complete other work around the 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 maintenance beginning at 10 p.m. on Thursday, July 9, until 6 a.m. Friday, July 10. During this time, all westbound SR 520 travelers coming from the eastside wanting to go north must exit at either Montlake Boulevard or Lake Washington Boulevard. Drivers who stay on westbound SR 520 beyond those exits will be detoured to southbound I-5. Closures Westbound SR 520 off-ramp to northbound I-5 and E. Roanoke St. closed select nights Aug. 19 – Sept. 3 Eastbound SR 520 off-ramp to Montlake Boulevard closed around-the-clock Sept. 12 – 19 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 11 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
