Project Details

OR 43 Interchange

ODOT will remove the current I-205 northbound on-ramp from OR 43 and northbound traffic will instead use a roundabout to access northbound I-205.

Why a Roundabout?

A roundabout improves safety and operations compared to a signalized intersection. The table below shows traffic control options considered at the northbound I-205 ramp terminal:

EVALUATION CRITERIA ROUNDABOUT SIGNAL
Interstate Access* from OR 43 Southbound
Interstate Access from OR 43 Northbound
Operations on OR 43
Safety
Access to/from Willamette Falls Drive
Compatibility with future improvements
Life-cycle cost savings

Ratings: = Positive = Neutral = Negative

*Proposed improvements include removal of the existing ramp meter and extension of the auxiliary lane to OR99E exit-ramp.

Source: A Safer Choice (FHWA-SA-08-006, a Roundabout Informational Guide)
https://safety.fhwa.dot.gov/intersection/innovative/roundabouts/fhwasa08006/fhwasa08006.pdf

Morning (AM) Peak Traffic Simulation

Afternoon (PM) Peak Traffic Simulation

Abernethy Bridge

Improvements will strengthen the Abernethy Bridge to withstand a major earthquake and help improve congestion by adding a third travel lane. Once complete, the bridge will be the first earthquake-ready interstate structure across the Willamette River and will have three travel lanes in each direction plus one auxiliary lane for people entering and exiting I-205.

Process

1. Construct new bridge foundations and widen to the outside of the existing bridge. Existing lanes will remain open to traffic during this time.

2. Roll existing bridges (in green) approximately 8 feet outward from their existing location during two separate weekend closures.

3. Complete remaining bridge widening toward the center to join the bridges together and remove existing supports. Existing lanes will remain open to traffic.

Updated Bridge

ODOT will upgrade and widen both the Abernethy Bridge supports and the upper structure (in green).

RealTime Signs Installed 

RealTime signs are part of a regional system to help drivers make more informed decisions about their travel routes.

Five traveler information signs were installed in 2020 to help travelers get where they’re going more safely and efficiently. These signs will display traffic flow information, roadway conditions and advisory speed limits. Two additional traveler information signs are planned in future construction phases.

Advisory Speed Signs

Monotube Advisory Speed Signs

Advisory speed signs, displaying recommended speeds based on the traffic ahead. The advisory speeds will change as real-time conditions change. These signs give drivers a heads-up to slow down before they reach a problem area—helping reduce rear-end crashes and the congestion they cause.

Travel Time Signs

Monotube Travel Time Signs

Travel time signs, which display estimated travel times to key destinations so that drivers can plan their arrival time or consider taking an alternate route.

Traveler Information Signs

Traveler information signs

Traveler information signs, which alert drivers about crashes, congestion, road conditions, closures and other traffic-related information, giving drivers the ability to make travel decisions in real time.

Read more about RealTime signs.

Improvements for People Walking and Biking

The I-205 Improvements Project includes new pedestrian and bicycle facilities around OR 43 and OR 99E to increase comfort for people walking, biking or rolling in these areas.

View improvements for people walking and biking on the map below.