Blue Triangle WILSONVILLE ROAD INTERCHANGE

I-5/Wilsonville Road Interchange Improvements

The I-5/Wilsonville Road Interchange

The Oregon Department of Transportation and the City of Wilsonville have designed a project to manage this busy freeway interchange. In its current condition, the interchange area experiences daily traffic backups due to insufficient ramp lengths and lane configurations. During peak traffic periods, vehicle backups extend onto I-5 creating a significant safety hazard. Without improvements, these conditions are expected to increase in the future.

Where is this project?

Click here for a map of the project area

What are the project goals?

This project will improve traffic flow on Wilsonville Road and the interchange ramps and provide greater capacity. The primary goals of the project are to:
  • Maintain safe and efficient operations of I-5 and Wilsonville Road by improving capacity and alleviating vehicle backups and other safety concerns;
  • Create high-quality bicycle and pedestrian passage through the interchange area; and
  • Improve the streetscape along Wilsonville Road.

What is happening at the Parkway Avenue intersection?

As part of this improvement project, steps are being taken to improve safety at the intersection of Parkway Avenue and Wilsonville Road.

When the I-5/Wilsonville Road Interchange was last improved in 1998, the plan included the closure of the intersection of Parkway Avenue and Wilsonville Road for both safety and functionality reasons. After many discussions, ODOT and the City agreed to restrict the intersection to right in-right out turning movements on an interim basis until this subsequent phase of interchange improvements when the intersection would be fully closed per the access control plan.

Due to the widening of the I-5 northbound off ramp and Wilsonville Road as part of the current project, the remaining turning movements into Parkway will no longer be safe. As a result, Parkway Avenue will be permanently closed and traffic will be routed one block over to the signal-controlled intersection at Town Center Loop West. A cul-de-sac at the end of Parkway Avenue near Wilsonville Road will be constructed. Parkway Avenue is scheduled to be closed as early as Jan. 6, 2011. 

What was included in the design phase?

This project design phase was complete in summer 2010. Design work included:
  • Surveying
  • Environmental services
  • Pavement design
  • Traffic analysis
  • Hydrological/hydraulic analysis
  • Geotechnical services
  • Roadway design
  • Structure design
  • Landscape design
  • Identification of ROW impacts
  • Utility coordination
  • Public involvement

What is the anticipated schedule?

  • Spring 2010: Project design activities completed
  • Fall 2010: Contractor bidding and selection
  • Winter 2011: Construction start
  • Summer 2012: Construction complete

How much will this project cost?

The estimated cost of this project is $21.5 million.







For more information, contact:
Elizabeth Craig, Community Affairs Coordinator
Oregon Department of Transportation - Region 1
(503) 731-8237
elizabeth.craig (at) odot.state.or.us