I-5 - SB Interstate Br to NE 99th St Vic - Active Traffic Management

Project news

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 99th 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.

Timeline

  • Summer 2019: Project goes to competative bid 
  • Early 2020: Construction scheduled to begin
  • Summer 2020: Construction scheduled for completion 

Funding

This project is estimated to cost between $4,000,000 - $5,000,000

Contact

WSDOT Columbia Gorge Area Project Office 
360-759-1310 
swGorge@wsdot.wa.gov 

Celeste Dimichina, Communications 
360-905-2057
dimichc@wsdot.wa.gov

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