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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.

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The Future Idaho 16

The vision for Idaho 16 is a limited-access expressway with two travel lanes in each direction. 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.


The interim design

The Idaho 16 project will be completed in phases between now and 2045.

ITD is preparing design plans now for an “interim” phase. Details will be posted later this year.

ITD is continuing to acquire property and investigate funding for construction.

Project background

Conversations about Idaho 16 began long before growth arrived. An Environmental Impact Statement – the highest level of environmental review – was completed in 2011 and updated in 2019.

In 2014, ITD completed the first 2.5 miles of highway between Idaho 44 and U.S. 20/26. In recent years, ITD has refined the design of the remaining five miles and reduced the footprint of the road.

In 2020, ITD received the green light to design the next step – an “interim” version of the highway.

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.

ITD will continue to communicate with and involve the public through final design and construction.

ITD completed an Environmental Impact Statement for Idaho 16
ITD designed and built the first 2.5 miles from Idaho 44 to U.S. 20/26
ITD refined the design for the remaining 5 miles, updated the EIS and reduced the highway footprint
Idaho Transportation Board gave ITD the green light to design an "interim" version of Idaho 16
ITD is completing final design of an interim phase (between I-84 and U.S. 20/26)
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