The Idaho Transportation Department will change the traffic pattern on westbound I-84 in Caldwell starting Sunday night. Westbound motorists are advised to drive with caution and follow signage.
Under the new traffic pattern, westbound traffic will split into two lanes just after the 10th Avenue Interchange. The right lane will allow drivers to either continue west or exit at Centennial Way, while the left lane will continue westbound with no access to the exit. Once the lanes split, there will be a physical barrier between them, and drivers will be unable to change lanes. Motorists should pay close attention to signage and make sure they are in the correct lane before the split, especially if they plan to exit at Centennial Way. The lanes will merge back together just after the Centennial Way Interchange and westbound traffic will return to its regular configuration. Click here to view a map of the traffic change.
To set up the traffic changes, crews will close the westbound off-ramp at Centennial Way the night of Sunday, July 13 from 10 p.m. to 5 a.m. Motorists will be detoured to Exit 26 where they can then return on I-84 eastbound to exit at Centennial Way. Click here to view a detour map.
In early August, crews plan to move into the next phase of construction. Westbound traffic will return to the westbound side of the highway and ITD expects to reopen the 10th Avenue westbound on-ramp at that time. The ramp was closed in June to reconstruct the westbound lanes on I-84.
The I-84 widening project in Caldwell began in November 2023 and includes:
- Widening I-84 to three lanes in each direction with auxiliary lanes between interchanges.
- Replacing the 10th Avenue Interchange.
- Removing one westbound on-ramp at the 10th Avenue Interchange.
- Updating the pedestrian overpass.
- Building a sound wall along Hannibal Street.
- Adding a traffic signal at the westbound ramps at the Centennial Way Interchange.
The speed limit in the construction zone is 55 miles per hour. Drivers should slow down, pay attention and follow all posted signs. Crews and heavy equipment will be working close to traffic.
Construction is expected to be finished in 2027. For more information and to sign up for email or text updates, visit itdprojects.idaho.gov/pages/i-84-corridor or call (208) 334-8002.
Drivers can also use Idaho 511 to check for real-time traffic impacts related to construction projects and road conditions statewide.