State Route 520 logo

Eastbound SR 520 closed between I-5 and Montlake Blvd. in Seattle Dec. 5-8

Date: Dec 5, 2025 to Dec 8, 2025

Time: 11 p.m. Friday to 5 a.m. Monday

Activity details:

  • check mark icon Full highway closure
  • check mark icon High-impact construction
  • check mark icon Around-the-clock

Impact type:

  • check mark icon Traffic
  • check mark icon Noise
  • check mark icon Vibration

Description: Crews will use this closure to continue removing existing barrier along the eastbound mainline and off-ramp to Montlake Blvd. and replace it with temporary barrier. 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 in Seattle will close for construction beginning at 11 p.m. on Friday, Dec. 5 until 5 a.m. Monday, Dec. 8. All traffic from I-5 wanting to use eastbound SR 520 will need to use alternate routes. Please note: Eastbound SR 520 will remain open across Lake Washington. It is only the section of eastbound SR 520 between I-5 and Montlake Boulevard that will close. In addition, the Montlake Boulevard on-ramp to eastbound SR 520 will be open. The SR 520 Trail and westbound SR 520 are not impacted by this closure.

Map showing the closure limits for eastbound SR 520's weekend closure Dec. 5-8
Click on image to expand
Map showing the closure limits for eastbound SR 520's weekend closure Dec. 5-8

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.