Overview
ITD is constructing improvements to I-84 between the Centennial Way and Franklin Road interchanges in Caldwell.
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- Widening I-84 to three lanes in each direction with auxiliary lanes between interchanges.
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- Replacing the 10th Avenue Interchange.
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- Removing one westbound on-ramp at the 10th Avenue Interchange.
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- Updating the pedestrian overpass.
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- Building a soundwall along Hannibal Street.
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- Adding a traffic signal at the westbound ramps at the Centennial Way Interchange.
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New Eastbound I-84 Lanes Open This Week!
Eastbound I-84 traffic in Caldwell is moving onto new permanent lanes!
Crews will shift traffic from the center of the interstate onto the new eastbound lanes between Centennial Way and Franklin Road, including the new side of the 10th Avenue Interchange bridge.
To complete the traffic shift, three eastbound ramps will close overnight on Friday, Oct. 9.
Here’s what to expect:
- The 10th Avenue and Franklin Road eastbound off-ramps will close.
- The 10th Avenue eastbound on-ramp will close.
- The ramps will close overnight on Friday, Oct. 9 from 10 p.m. to 6 a.m.
- Motorists must exit early at Centennial Way (Exit 27). If you miss this exit, you will need to continue to Karcher Road (Exit 33) in Nampa. View the detour map.
Only one night of multiple ramp closures is needed to complete the traffic shift. Thank you for your patience as crews bring the project closer to completion!
Watch the September 2026 I-84 Corridor Monthly Update Now!
A special guest joins this month’s I-84 Corridor update!
Caldwell’s Mayor Eric Phillips joins Matt Kreizenbeck and Styles Salek in the September I-84 Corridor Monthly Update.
Watch the video to get the latest on:
- Construction between the Centennial Way and Franklin Road interchanges.
- Upcoming closures on 10th Avenue.
- ITD’s plans for the US 20-26 Notus/Parma exit in Caldwell.
Current traffic impacts
Here is what motorists can expect right now. This section is updated as conditions change.
- View the latest email update.
- Please plan for nightly lane closures over the next several months as crews widen I-84 in Caldwell.
- 10th Avenue westbound loop ramp is closed until summer 2027. View the detour map.
- Frontage Road: one-way traffic until 2027.
- Wide loads are restricted on ramps. Check Idaho 511 for current width restrictions.
What to expect during construction
Construction will happen in stages. Below are impacts you will see throughout the project.
- All lanes of l-84 will be open in both directions during the day.
- 10th Avenue westbound loop ramp will be closed until summer 2027. View the detour map.
- Overnight closures and lane restrictions will be necessary on I-84.
- Extended ramp closures at the Centennial Way and 10th Avenue interchanges (Exits 27 and 28) will occur.
- One-way traffic on Hannibal Street and Frontage Road until 2027.
- Access to local businesses will be open, but your route may change.
What will Centennial Way to Franklin Road look like once completed?
TECM funding
This project is being funded with Transportation Expansion and Congestion Mitigation (TECM) funds as part of Governor Little’s Leading Idaho initiative. The program allows ITD to accelerate project timelines to address rapid growth and build critical infrastructure today that would otherwise take many years to fund and build.
The I-84 corridor is one of 13 approved TECM corridors in the state. Funding for the construction phases on this corridor will be determined based on project readiness and funding availability.
Other projects in the area
Click the map to find more information about nearby construction projects, or contact your local agency below:
- Idaho Transportation Department
- I-84 Karcher Interchange Project | (208) 377-9688
- SH-55: Farmway to Middleton | (208) 377-9688
- Highway District 4:
- Farmway/Ustick Roundabout Project | (208) 454-8135
- City of Caldwell:
- Linden and Ward Roundabout | (208) 377-9688
- City of Nampa:
- Middleton Road Culvert Work | (208) 465-2221
Downloads & Resources
Contact the project team
If you have questions or comments about this project, contact the project team at 84corridor@itd.idaho.gov or 208-334-8002. You can also text 84CORRIDOR to 1-866-483-8422.
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