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SH-44 Corridor Plan

The Idaho Transportation Department is developing long-term plans to improve State Highway 44 from Caldwell to Eagle.

The plan will identify specific actions for improving safety, addressing mobility and supporting economic opportunity along the highway between I-84 in Caldwell and West State Street in Eagle.

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The SH-44, I-84 to West State Street in Eagle project will build upon ITD's earlier corridor work and includes:

> Updating traffic projections through 2045.

> Developing concept designs for high volume intersections, travel lanes, and any necessary shifts of the roadway.

> Completing an environmental analysis of how the design concepts would affect noise, air quality and other environmental factors along the corridor.

Traffic study

A traffic study for traffic volumes, necessary lane counts and intersection improvements on SH-44 through 2045. (An earlier traffic study was completed in 2014 and will be updated for this project.)

Long term plans

These plans will include concept designs of three high volume intersections, number of lanes, any needed change of the highway centerline and improvements.

In addition, ITD will determine future right-of-way needs along SH-44 in order to construct improvements.

Environmental anaylsis

An environmental analysis is required before ITD can use federal funds to design and construct improvements. The previous Environmental Assessment addressed all elements required by the National Environmental Policy (NEPA) including issues such as noise, air quality, wetlands, visual impacts, natural resources, historic structures and other issues.

ITD will update this information based on any changes to the proposed improvements and traffic data, and will on build on the previous work on this corridor.


ITD has already set aside funds to widen SH-44 in two locations:

  • 2022: Widening SH-44 from two to four lanes between Idaho 16 and Linder Road. Visit the project website for details.
  • 2024: Widening SH-44 from two to four lanes between Star Road and Idaho 16.

Work on these projects cannot begin until ITD completes this project and receives environmental clearance.

A phasing plan will identify how ITD will prioritize improvements as funds become available.

Community Involvement

Community involvement is important to the Idaho Transportation Department and to the success of this project.

ITD will provide multiple opportunities for community to provide input on proposed improvements to SH-44.

Update traffic study
Continue environmental analysis
Confirm concept designs
December 2019
Hold public meeting
Complete environmental analysis
Confirm proposed improvements
Hold public hearing
Finalize environmental analysis and proposed improvements
© Copyright 2023 Idaho Transportation Department Visit ITD Website

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