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I-84, Franklin Road to Karcher Interchange

The Idaho Transportation Department completed improvements to Interstate 84 between Franklin Road (Exit 29) in Caldwell and Karcher Road (Exit 33) in Nampa.

The work improved mobility, increased safety and benefited the regional economy.

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The Idaho Transportation Department has opened a new third lane in both directions between Franklin Road (Exit 29) in Caldwell and Karcher Road (Exit 33) in Nampa.

Watch ITD’s video series leading up to the opening:

Project Overview

This project was necessary to improve safety and mobility on I-84 in Canyon County. The existing interstate can no longer accommodate current traffic volumes at peak periods of the day. As the Treasure Valley continues to grow, congestion in this corridor will increase.

Improvements included:

  • Widened I-84 to three lanes in each direction from the Franklin Road Interchange in Caldwell to the Karcher Road Interchange in Nampa.
  • Replaced and widened the canal, culvert and lateral crossings.
  • Replaced the Middleton and Ustick overpasses.
  • Added new noise walls along I-84 near the Ustick Overpass and on the Franklin westbound on-ramp.
  • Replaced the I-84 bridges over Linden Road.
  • Added an additional lane on Franklin and Karcher westbound off-ramps.


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but all comments will be publicly visible**
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