SR 520 closed overnight across Lake Washington this Thursday, Nov. 16, northbound Montlake Boulevard and Lake Washington Boulevard closed this weekend; Portage Bay Bridge project update

There is a horizontal green band that reads Rest of the West News. Above it is the letters W S D O T. An oval on the right reads state route 520.

In this update:

Heads up night owls: SR 520 closed overnight this Thursday, Nov. 16

Tomorrow night, crews will close SR 520 in both directions (and all associated on- and off-ramps) between I-5 in Seattle and 92nd Avenue Northeast in Clyde Hill. The highway, including all associated on- and off-ramps, closes at 11:59 p.m. Thursday, Nov. 16 and reopens at 5 a.m. Friday, Nov. 17.  The six-hour closure is needed to test a newly installed waterline across SR 520.

Northbound Montlake Boulevard and Lake Washington Boulevard closing all weekend, Nov. 17-20

Crews will close the northbound lanes of Montlake Boulevard this weekend between East Hamlin Street and East Louisa Street. The lanes will close from 10 p.m. Friday, Nov. 17 to 5 a.m. Monday, Nov. 20.

This closure includes both the westbound and eastbound SR 520 off-ramps to Montlake Boulevard. Drivers heading eastbound from I-5 will need to pay the SR 520 bridge toll. The SR 520 Trail will remain open.

Additionally, crews will close Lake Washington Boulevard between Montlake Boulevard and East Foster Island Road from 10 p.m. Friday, Nov.17 until 5 a.m. Monday, Nov. 20 for utility and paving work. Local access will be maintained.

Mercer Street on-ramps to I-5 closed overnight tonight and tomorrow, Nov. 15 and 16

From 10 p.m. until 5 a.m. nightly on Nov. 15 and 16, the Mercer Street on-ramps to both northbound and southbound I-5 will close. Crews will use these closures for underground utility work.

All drivers will need to use alternate routes to access I-5 from the South Lake Union neighborhood. Signed detours will be in place.

Update on the Portage Bay Bridge and Roanoke Lid Project Proposer Bid Opening

On Sept. 13, 2023, WSDOT opened bids from the two teams that submitted proposals for the Portage Bay Bridge and Roanoke Lid Project. We announced Skanska’s proposal as having the Apparent Best Value (ABV). Their $1.375B price proposal exceeds the engineer’s estimate by about 70%.

With the support of the Governor's office and transportation legislative leadership, we have begun negotiations with Skanska to extend their proposal validity through the end of the 2024 legislative session on March 7 (it was previously set to expire on Nov. 20, 2023). We will continue to keep you updated once we have finalized a path forward.

Montlake Project signage community meeting materials available

Thanks to all who participated in our recent community meeting regarding Montlake Project signage. You can access the presentation on our website and watch the meeting recording on YouTube. If you would like to like to receive updates related to the Montlake sign bridge, you can email us at to be added to the email list (if you are not already on it).

There’s still time to sign up for today’s monthly Montlake construction meeting

We’re holding our next Montlake Project monthly meeting virtually at 12:30 p.m. today, Wednesday, Nov. 15. Join us to learn about current and upcoming construction activities, including planned street and highway closures. Register below to attend and participate in a Q&A.

Date/Time: Wednesday, Nov. 15 at 12:30 p.m.

Construction Corner roundup

  • Ongoing: Montlake Boulevard on-ramp to eastbound SR 520 closed weeknights
  • Nov. 15 and 16: Mercer Street on-ramps to northbound and southbound I-5 closed overnight
  • Nov. 16-17: SR 520 closed across Lake Washington overnight; SR 520 Trail open
  • Nov. 17-20: Northbound Montlake Boulevard closed between East Hamlin Street and East Louisa Street; SR 520 Trail open
  • Nov. 17-20: Lake Washington Boulevard closed between East Foster Island Road and Montlake Boulevard

Check out the SR 520 Construction Corner map for the most up-to-date information on closures and construction impacts.

How to reach us and stay informed about SR 520 construction:

  • Call or text our project-specific construction hotlines with pressing questions or concerns related to the:
    • Montlake Project: 206-775-8885
    • SR 520/I-5 Connection Project: 206-316-2559 
  • Call the SR 520 Program information line (206-200-9484, M-F 8 a.m. - 5 p.m.) with general SR 520 inquiries.
  • Email SR 520 staff with your questions about the project or construction activities.
  • Visit the SR 520 Construction Corner for the most up-to-date information on closures and construction impacts.
  • Visit the SR 520 Program website to find general information about the project.
  • Email Regina Glenn, WSDOT Megaprograms Diversity and Inclusion Manager, for more information about contracting opportunities.
  • Follow us on Twitter @wsdot_520 to get key news and updates about the SR 520 program.
  • View current Montlake Project construction photos, taken continuously day and night, by mounted construction cameras
  • Share the ROTW listserv with your friends and neighbors

If you have difficulty understanding English, you may request language assistance services free of charge by calling (360) 705-7090 or emailing TitleVI@WSDOT.WA.GOV.

Español - Spanish servicios de traducción Aviso a personas con dominio limitado del idioma inglés: Si usted tiene alguna dificultad en entender el idioma inglés, puede, sin costo alguno, solicitar asistencia lingüística con respecto a esta información llamando al (360) 705-7090, o envíe un mensaje de correo electrónico a: TitleVI@WSDOT.WA.GOV.

中文 - Chinese 翻译服务 如果您难以理解英文,则请致电:(360) 705-7090,或给我们发送电子邮件: TitleVI@WSDOT.WA.GOV,请求获取免费语言援助服务。

tiếng Việt-Vietnamese các dịch vụ dịch thuật Nếu quý vị không hiểu tiếng Anh, quý vị có thể yêu cầu dịch vụ trợ giúp ngôn ngữ, miễn phí, bằng cách gọi số (360) 705-7090 hoặc email cho chúng tôi tại: TitleVI@WSDOT.WA.GOV.

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русский - Russian Услуги перевода Если вам трудно понимать английский язык, вы можете запросить бесплатные языковые услуги, позвонив по телефону (360) 705-7090 или написав нам на электронную почту: TitleVI@WSDOT.WA.GOV.

ِيَّة Arabic - اَلْعَ َرب خدمات الترجمة إذا كنت تجد صعوبة في فھم اللغة الإنجلیزیة، فیمكنك مجان ا طلب خدمات المساعدة اللغویة عن طریق الاتصال بالرقم .TitleVI@WSDOT.WA.GOV: الإلكتروني البرید عبر مراسلتنا أو)، 360) 705-7090


Thank you for signing up for the SR 520 Rest of the West news email updates. WSDOT will keep the community informed of current and planned construction activities through these updates and the tools listed above.