The project will remove the current I-205 northbound on-ramp from OR 43. Northbound traffic will instead use a roundabout to access northbound I-205.
A roundabout improves safety and operations compared to a signalized intersection. The table below shows traffic control options considered for the northbound I-205 on-ramp:
|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