Extended ramp closures and traffic changes will begin on I-84 this month as the Idaho Transportation Department nears the halfway point of a major interstate reconstruction in Caldwell.
Although exact dates are subject to weather and other factors, ITD expects that:
- Tonight (May 15) the 10th Avenue westbound on-ramp will close at 10 p.m. and remain closed through August. Traffic will detour to the westbound on-ramp at Centennial Way. Detour map
- On May 22, the Centennial Way westbound off-ramp (Exit 27) will close overnight from 10 p.m. to 5 a.m. so crews can move traffic onto the newly constructed concrete lanes. Traffic will be detoured to the eastbound off-ramp, using the Notus/Parma Exit (Exit 26) to turn around. Detour map
- Beginning May 23, westbound traffic exiting at Centennial Way will follow a new ramp configuration, located before the previous off-ramp. Motorists will need to exit early to use the temporary design, which will be in place through August. View map
“Our crews have an enormous amount of work to complete in a tight work zone,” ITD Resident Engineer Styles Salek said. “Closing the 10th Avenue westbound off-ramp this summer allows us to get the work done quickly and safely while the weather holds. We appreciate motorists being patient and planning ahead during construction.”
In addition, motorists can expect occasional nighttime lane restrictions and short-term ramp closures on I-84 this summer. To request email or text updates about upcoming closures, text 84CORRIDOR to 1-866-483-8422 or email 84CORRIDOR@itd.idaho.gov.
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 I-84 work zone is 55 mph. With crews, trucks and heavy equipment operating close to traffic, ITD urges motorists to slow down, stay alert and follow all posted signs.
Construction on I-84 in Caldwell will be completed in 2027. For more information, visit itdprojects.idaho.gov/pages/i-84-corridor or call (208) 334-8002.