I-5 Ramp-to-Ramp (Auxiliary) Lanes & Shoulders
Three Interstates (I-5, I-84, and I-405) intersect in the short distance between the Morrison Bridge and the Fremont Bridge, creating the biggest bottleneck in the state of Oregon. This outdated design with closely spaced interchanges and no shoulders has resulted in this section of I-5 having the highest crash rate in the state.
With a new ramp-to-ramp lane in each direction on I-5 from I-84 to I-405, drivers will experience a safer, more reliable trip with less potential for crashes. A ramp-to-ramp lane allows drivers more space to merge without having to merge with through traffic if they are going to the next exit. Drivers can stay in the right lane and exit at the next opportunity. Adding continuous 12-foot shoulders for length of project area will also create space for disabled vehicles to move out of through traffic, allow emergency vehicles to respond more quickly, and keep people moving. With extra space to address crashes, breakdowns, or emergencies, drivers will be able to avoid the disruption of closed lanes or stalled vehicles in the middle of the road.
Adding these upgrades is expected to reduce crashes up to 50 percent on I-5, save over 2.5 million hours of travel time each year, and result in $732 million in economic benefits while staying within ODOT’s existing property.