Drivers on Interstate 84 in Caldwell will see a major change Friday and Saturday nights as westbound traffic shifts back to the westbound side of the interstate between the Centennial Way and Franklin Road interchanges.
To complete the traffic shift, I-84 will have several overnight ramp closures between the Centennial Way and Franklin Road interchanges from Thursday through Saturday between 10 p.m. and 5 a.m. These closures will allow crews to safely establish the new traffic pattern, which is expected to remain in place through summer 2026.
This milestone marks a key phase in the Idaho Transportation Department’s I-84 widening project. For the past year, westbound traffic has been temporarily using the eastbound side of the interstate to allow crews to rebuild the westbound lanes and add a third travel lane along with an auxiliary lane.
Now that work on the westbound lanes is completed, westbound traffic will return to the westbound side. Drivers will travel on the outer lanes while crews begin work in the center median. Two lanes will remain open in each direction during construction.
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
- Replacing the 10th Avenue Interchange
- Removing one westbound on-ramp at the 10th Avenue Interchange
- Updating the pedestrian overpass
- Constructing a soundwall along Hannibal Street
- Adding a traffic signal at the westbound ramps at the Centennial Way Interchange
The speed limit in the work zone is 55 mph. Drivers are asked to slow down, pay attention and follow all posted signs. Crews and heavy equipment will be working close to traffic.
Construction remains on schedule and is expected to be completed in 2027.
For real-time traffic updates and statewide road conditions, visit 511.idaho.gov or use the Idaho 511 app.