State Route 520 logo

Westbound SR 520 closed between Montlake Boulevard and I-5 nightly June 4 and 5

Date: June 4, 2025 to June 5, 2025

Time: 11 p.m. to 5 a.m. nightly (Montlake Blvd. on-ramp to westbound SR 520 closes at 10 p.m. on these nights)

Activity details:

  • check mark icon High-impact construction
  • check mark icon Overnight

Impact type:

  • check mark icon Traffic
  • check mark icon Noise

Description: Crews will use the closure for work related to the SR 520 Portage Bay Bridge and Roanoke Lid Project.

Traffic: Westbound SR 520 between Montlake Boulevard and I-5 in Seattle will close for construction nightly beginning at 11 p.m. through 5 a.m. on Wednesday, June 4, and Thursday, June 5. Please note: The Montlake Boulevard on-ramp to westbound SR 520 will close at 10 p.m., while the mainline and remaining westbound ramps to I-5 and Roanoke Street will close at 11 p.m.

Map graphic of WB closure from Montlake to I-5
Click on image to expand
Map graphic of WB closure from Montlake to I-5

Contact Info

Email: sr520bridge@wsdot.wa.gov
24-hour construction hotline: 206-319-4520

Note: This tool is presented for planning purposes only. Construction is inherently dependent on weather and other factors, and activities are subject to change.