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Replacing the Middleton and Ustick overpasses will make room for expanding I-84 in Canyon County.

The Middleton and Ustick overpasses were built in 1966 and do not allow room for additional lanes on I-84. The Idaho Transportation Department is making plans to replace both overpasses in 2020.

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Design Process

The Middleton and Ustick overpasses are located on I-84 between the Franklin Road and Karcher Road interchanges. This work is part of ITD’s long-term vision for expanding I-84 from Nampa to Caldwell.

In 2018, the Federal Highway Administration accepted a proposal from ITD to complete the environmental study in smaller parts. This allowed ITD to move forward with designing improvements between Franklin Road and Karcher Road, including the Middleton and Ustick overpasses.

Public Input

ITD is in the process of working with local jurisdictions, key stakeholders and the traveling public to determine the best design for the overpasses.

The community will be invited to provide input about the overpass designs at an open house in Summer 2019.

Traffic Study Outcomes

A traffic analysis was completed in 2018 for this area of I-84. The study included a detailed review of future traffic needs.

The analysis concluded that future traffic needs will be addressed by widening I-84 and improving existing interchanges. 


**All contact information will be kept confidential,
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Spring/Summer 2019
Develop preliminary design
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Summer 2019
Gather input at community open house
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Fall 2019
Complete final design
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Spring 2020
Begin construction
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Downloads & Resources

Communication MaterialsAsset 4
I-84 CorridorAsset 4
Contact the I-84 Corridor project teamAsset 4

Middleton & Ustick Open House

July 24, 2019

4:00 pm - 6:30 pm

Canyon County Paramedics

The Idaho Transportation Department is planning to replace the Middleton Road and Ustick Road overpasses in Canyon County. Replacing the overpasses will allow additional lanes to be built on I-84. You're invited to stop by an open house to review design plans and learn what's ahead.

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Upcoming meetings

July 24, 2019
Canyon County Paramedics
4:00 pm - 6:30 pm
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