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Idaho 16, I-84 to Idaho 44 Corridor

The Idaho Transportation Department continues to invest in the Idaho 16 corridor in Ada and Canyon counties.

When complete, this highway will connect I-84 to Idaho 44 and will offer more transportation options to meet the long-term needs of the Treasure Valley. ITD has completed the re-evaluation of the 2011 Environmental Impact Statement (EIS) and preliminary design of Idaho 16.

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Idaho 16 Phasing Plan & Other Resources
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The Future Idaho 16

The design plans for Idaho 16 will meet transportation needs through 2045 and allow the project to be completed in phases. Click here for the Idaho 16 Phasing Plan

The new 7.5-mile highway will have two travel lanes in each direction separated by a median barrier.

Drivers will be able to access Idaho 16 at:
• I-84
• Franklin Road
• Ustick Road
• U.S. 20/26
• Idaho 44

Idaho 16 will cross over Cherry Lane and McMillan Road. A network of local roads will provide access to and from neighborhoods and businesses.

Idaho 16 Phasing Plan

What is happening now?

ITD is in the process of acquiring property now and anticipates this will continue through 2021.ITD is investigating funding sources and options.

ITD is finalizing the design so the project will be ready for construction when funding is available.

Project background

ITD began working on the extension of Idaho 16 from I-84 to Idaho 44 in 2006 with an environmental study of the corridor. An Environmental Impact Statement (EIS) and subsequent Record of Decision (ROD) were approved in April 2011 and gave ITD the clearance to further develop the corridor.

In 2014, ITD constructed the initial phase of the Idaho 16 from Idaho 44 to U.S. 20/26.

In 2017 and 2018 the Idaho Transportation Board and the Community Planning Association of Southwest Idaho both passed resolutions for ITD to continue work on Idaho 16. This allowed ITD to move forward with several actions from 2018 to 2020:
• Updating elements of the 2011 environmental study
• Advancing design efforts to be ready for future funding
• Updating right-of-way and construction cost estimates
• Developing construction phasing options

Community involvement

From the beginning of the Idaho 16 project in 2006, community involvement has been an important component to this project. ITD has invited the community to participate in one-on-one and small-group meetings, workshops, a public hearing and an open house. Input gathered at these events helped ITD advance the Idaho 16 project to preliminary design. ITD will continue to communicate with and involve the public through final design and construction.

2006
ITD began an environmental study of the corridor.
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2011
The Environmental Impact Statement was approved, giving ITD clearance to develop the corridor.
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2014
ITD constructed the initial phase of Idaho 16 from Idaho 44 to U.S. 20/26
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2017-2018
The Idaho Transportation Board and COMPASS passed resolutions to continue work.
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2018
ITD updated traffic and property data, held a stakeholder workshop and updated elements of the 2011 EIS.
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2019
ITD met with property owners, hosted a second stakeholder workshop and hosted a public open house.
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2019-2020
ITD refined the design, updated cost estimates for right-of-way and construction and developed a phasing plan.
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2020-2021
ITD purchases property from land owners.
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2021
ITD will finalize highway design to be ready for construction once funding is available.
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Downloads & Resources

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