Southbound I-5 lane closures coming this weekend for RealTime Signs installation

Oregon Department of Transportation sent this bulletin at 03/25/2025 03:29 PM PDT

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Southbound I-5 lane closures coming this weekend for RealTime Signs installation

RealTime Signs: Ross Island Bridge to SW Terwilliger: Example Sign Bridge

Contact: David House, 503-551-8641

PORTLAND - ODOT is improving its RealTime system to make roads safer and help Oregonians get where they are going more efficiently by providing real-time traffic information to drivers.

We are installing RealTime Variable Advisory Speed (VAS) signs along a busy stretch of Interstate 5 south of downtown Portland from the Ross Island Bridge to Terwilliger Boulevard.

Construction on this project requires weekend work that will cause congestion on I-5 south. We will have an around-the-clock right lane closure on I-5 southbound this weekend from 8 p.m., Friday, March 28, to 6 a.m. Monday, March 31.

  • The right lane closure will be from SW Corbett Avenue to SW Terwilliger Boulevard.
  • Ramps will remain open.
  • Drivers should expect congestion and delays on I-5 south. 
  • The I-5 northbound right lane will have a weekend closure at a future date. We will share details when we have that information.​

Lane closure dates are subject to change. Nighttime lane closures on I-5 will continue intermittently throughout the project.

RealTime Signs: Ross Island Bridge to SW Terwilliger Project Map

(Project area map) (Mapa del área del proyecto)

Future Traffic Impacts

Traffic impacts on I-5 include intermittent nighttime lane closures, up to four weekend lane closures and up to five overnight closures in the project area. Expect delays and use caution when driving through the work zone.

  • Up to five nights of full closures of I-5 this summer. These are needed to install the new sign bridges spanning the interstate. 
    • Closures will occur between midnight and 5 a.m.
    • Several on-ramps leading to the area will also close.
    • Neighborhood traffic can detour using Barbur Boulevard.
    • Regional traffic detours will use I-205 to I-84 or U.S. 26 to OR 217.

We will continue to share dates and details of the traffic impacts on the project website in advance.