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:
|Interstate Access* from OR 43 Southbound|
|Interstate Access from OR 43 Northbound|
|Operations on OR 43|
|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)
Morning (AM) Peak Traffic Simulation
Afternoon (PM) Peak Traffic Simulation
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.
ODOT will upgrade and widen both the Abernethy Bridge supports and the upper structure (in green).
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, 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, which display estimated travel times to key destinations so that drivers can plan their arrival time or consider taking an alternate route.
View improvements for people walking and biking on the map below.