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ITD Projects Southwest Idaho Idaho (S.H.) 44 Corridor Preservation Study

Idaho (S.H.) 44 Corridor Preservation Study

Idaho (S.H.) 44 Corridor Preservation Study

Study Facts
Key Number: 7827
Project Number: STP3320(101)

The Idaho Transportation Department (ITD) is studying Idaho 44 from the city of Eagle to I-84 in Caldwell to determine future improvements. This study is called the State Highway (Idaho) 44 Corridor Preservation Study. ITD needs to preserve the corridor in order to accommodate future traffic demands.

Study Background

Idaho 44 is one of a few east-west roadways from Caldwell to Boise and it is an important commuter route in the Treasure Valley. To plan improvements to this corridor, ITD began this study in partnership with the Community Planning Association of Southwest Idaho (COMPASS) in 2005. Land adjacent to the roadway is being developed and the future is expected to bring mixed-use development. Future development will transform Idaho 44 from a rural roadway into a busy urban corridor.

Over the past seven years, ITD has:

  • Began an environmental review process of the Idaho 44 corridor.
  • Held open houses to provide the public with an opportunity to learn about the corridor study and give input on the highway’s future. Stakeholders have expressed concerns, identified needs, and provided input on improvement options. Click here to review a summary of past comments.
  • Developed conceptual roadway features.
  • Identified access management strategies.

ITD is continuing to work with cities, counties, local highway districts and the public to keep Idaho 44 functioning as a safe, major east-west route.

Study Components
Several key components will be completed during this study, including
  • A corridor plan that identifies future right-of-way needs and proposed lane configurations. A corridor plan is based on a 20-year forecast and series of recommendations for managing and improving the transportation system
  • An approved environmental document that will evaluate possible impacts to: agricultural resources, air quality, native plants and animals, cultural and historical resources, geology and soils, hazardous and toxic materials, hydrology and water quality, land use planning, noise, mineral resources and recreation.
  • An access management plan that describes a set of design techniques that state and local governments use to control access on and off highway.

    • Planning
      Transportation planning is an important component of this study. It allows ITD to:
      • Develop safety and congestion management strategies in the corridor area, including limiting access points on and off the highway.
      • Identify future right-of-way needs.
      • Prioritize proposed improvements.
      • Assure consistency between the transportation improvements and the land use comprehensive plans for the cities and counties.

    • Highway Needs
      Needs ITD proposes to widen and improve the entire corridor from the city of Eagle to I-84 in Caldwell. Based on input from local governments, highway districts and the public, the roadway’s future design considerations are being developed.

      The roadway’s future design considerations include:

      • Two lanes of travel in each direction.
      • Signalized intersection every half mile at the minimum
      • 10 foot paved shoulders
      • Urban features (i.e., sidewalks) where appropriate (i.e., Star)
      • Additionally, ITD has incorporated the Middleton southern bypass as identified in the City of Middleton’s Comprehensive Plan and the regional long range transportation plan, Communities in Motion. This bypass would start near Canyon Lane, continue east connecting to Middleton Road near South Kings Avenue, and connect back into the existing highway near Duff Lane. Click here to see a map of the proposed bypass.

    • Environmental Review
      The National Environmental Policy Act (NEPA) requires a complete environmental review before land can be acquired and improvements built with federal funds.A draft Environmental Assessment (EA) is in the process of being completed. The EA will identify impacts to:
      • Social and Economic Conditions/Environmental Justice/Land use
      • Archaeological, Cultural and Historical Resources/Visual Quality
      • Transportation, Noise and Air Quality
      • Wetlands/Wildlife, Fish and Vegetation/Threatened and Endangered Species
      • Surface Water/Floodplains/Water Quality/Groundwater/Soils
      • Hazardous Materials

      Please visit: for more information on these studies.

      After ITD receives and addresses public comment on the draft EA, they will submit the Final EA to the Federal Highway Administration (FHWA). ITD anticipates the EA will be reviewed by FHWA during 2013. The EA must be approved and issued before corridor improvements can occur or before land can be acquired.

      Once complete, ITD will use the Idaho 44 Corridor Preservation Study to:

      • Manage improvements to the transportation system within the corridor.
      • Guide the development of a specific access management plan for the corridor.
      • Design and construct projects within the corridor as funding becomes available.

      Transportation agencies and city planners will continue to coordinate on issues such as access management and future development as the study progresses.

      Funds are currently not available to acquire land, prepare preliminary design plans or construct any components of this project.

Contact Us
  • Adam Rush, Idaho Transportation Department, Public Involvement Coordinator,, (208) 334-8119

Compliance with Title VI of the Civil Rights Act

The Idaho Transportation Department (ITD) is committed to compliance with Title VI of the Civil Rights Act of 1964 and all related regulations and directives. ITD assures that no person shall on the grounds of race, color, national origin, gender, age or disability be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any ITD service, program, or activity. The department also assures that every effort will be made to prevent discrimination through impact of its programs, policies and activities on minority and low-income populations. In addition, the department will take reasonable steps to provide meaningful access to services for persons with Limited English Proficiency.


Idaho 44 Screening Document

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Page Last Modified: 11/4/2014 7:45:43 AM

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Idaho Transportation Department
3311 W. State Street · P.O. Box 7129
Boise, ID 83707-1129
(208) 334-8000