I-5 - SB Interstate Br to NE 78th St Vic - Active Traffic Management

Project news

  • Project was awarded to Mill Plain Electric, Inc. on Sept. 9, 2019

Due to an increase in congestion on southbound I-5 during weekday, morning peak commute times (typically between 5:30-9 a.m.) and in an effort to improve safety and trip reliability, beginning in early 2020, contractor crews working for the Washington State Department of Transportation will install an Active Traffic Management (ATM) system, along southbound I-5, from between Northeast 78th Street to the Interstate Bridge. This technology based system works by managing and controlling traffic based on real-time traffic conditions with the use of ramp meters, over-the-lane, variable messaging signs (VMS) displaying lane closures, advised speed limits, travel times and incident information. 

Needs & benefits

The answer to reducing congestion is not always as simple as adding more lanes to the highway, which can be costly. An ATM system is a cost-effective strategy that helps alleviate congestion by providing the right information to the drivers at the right time. Advance information of incidents down the road helps prevent sudden changes in traffic conditions. 

Ramp metering during peak commute hours of traffic aids the functioning of the ATM system by controlling vehicles entering the freeway, further smoothening traffic flow.


  • Summer 2019: Project awarded on Sept. 9, 2019 
  • Early 2020: Construction scheduled to begin
  • Summer 2020: Construction scheduled for completion


Financial Data for PIN 400019I
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $6,108
CWA $0
Total $6,108


WSDOT Columbia Gorge Area Project Office 

Celeste Dimichina, Communications 

I-5 - Southbound Interstate Bridge to NE 99th Street Vic - Active Traffic Management Project location map