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Building Idaho’s Future Idaho 16 Extension

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

Para solicitar más información sobre este proyecto en Español, por favor llame (208) 334-8152

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The highway

Idaho 16 will have two lanes in both directions with a center median barrier and 10-foot shoulders. Motorists will be able to get on or off Idaho 16 at I-84, Franklin Road, Ustick Road, U.S. 20/26 and Idaho 44.

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

This project is part of Idaho Governor Brad Little’s “Building Idaho’s Future” transportation funding solution.

A phased approach

The corridor will be finished in multiple phases. This approach will provide local access and regional mobility sooner.

Phase 1 opened in 2014. It included building a bridge over the Boise River and constructing the highway between U.S. 20/26 and State Highway 44.

Phase 2 includes finishing the remaining five miles of the highway, building bridges over local roads, and laying the groundwork for interchanges, which will be constructed in a future phase. Construction of Phase 2 could begin as early as Spring 2022.

Community input

ITD worked side by side with other transportation agencies, the development community and the public for many years to develop the vision and design for Idaho 16. The process has included a series of community workshops and public meetings. Click here to visit the most recent online meeting.

To hear more about the history of this project, listen to the April 2021 episode of the Drive Idaho podcast.

2006-2011
ITD completed an Environmental Impact Statement for Idaho 16
2012-2014
ITD designed and built the first 2.5 miles from Idaho 44 to U.S. 20/26
2017-2019
ITD refined the design for the remaining 5 miles, updated the EIS and reduced the highway footprint
2020
Idaho Transportation Board gave ITD the green light to design the next phase of Idaho 16
2020-2022
ITD is completing final design of Phase 2 (between I-84 and U.S. 20/26)
Spring/Summer 2022
Construction of Phase 2 expected to begin
Frequently Asked Questions
ITD thanks everyone who participated in online meetings, Q&A sessions or pop-up meetings this spring and summer. Here are a few of the most frequent questions we received.
Construction
What is the timeline to build this project?
What is the timeline to build this project?

ITD is building Idaho 16 in multiple phases:

  • Construction of Phase 1 was completed in 2014 between U.S. 20/26 and Idaho 44.
  • Construction of Phase 2 is expected to begin in 2022 and be completed within 2-3 years. This phase will include the remaining 5 miles of roadway, bridges over Cherry Lane and McMillan Road, and at-grade intersections where future interchange ramps will be.
  • The “ultimate vision” will include interchanges with bridges over Franklin Road, Ustick Road, U.S. 20/26 and Idaho 44. ITD is beginning design of these interchanges. Once these interchanges are funded, ITD will begin construction as quickly as design plans are finished.
Construction
When and where will ITD begin construction?
When and where will ITD begin construction?

Construction of Phase 2 is funded and will begin in 2022. It is expected to take 2-3 years to complete. At this point, it is too early to know the location where ITD will begin construction. ITD is preparing construction plans and will work closely with the construction contractor(s) to complete the work as efficiently as possible.

General
What is the status of right-of-way purchases?
What is the status of right-of-way purchases?

ITD has been in conversation with property owners for many years. ITD continues to make significant progress on the acquisition of property needed for this project.

Bicycles and Pedestrians
How will ITD accommodate bicycles and pedestrians?
How will ITD accommodate bicycles and pedestrians?

Because Idaho 16 will be a high speed, limited access highway, it is not a route for pedestrians and cyclists traveling north or south. However, there are existing north-south roads that parallel Idaho 16 and will provide for bike and pedestrian travel.

The Idaho 16 project will accommodate east-west travel by cyclists and pedestrians in several locations.

  • Franklin Road will include sidewalks and bicycle lanes within the project limits.
  • Ustick Road will include shared-use pathways on both sides of the road within the project limits.
  • S. 20/26 will include a shared-use pathway within the project limits.
  • The bridges going over McMillan Road, Ten Mile Creek, Five Mile Creek, Cherry Lane and the railroad tracks are long enough for bicycle/pedestrian pathways to be built by local jurisdictions in the future.
Noise
Will ITD build noise walls along Idaho 16?
Will ITD build noise walls along Idaho 16?

No. ITD completed a detailed noise evaluation in 2010 and updated the study in 2020. The noise evaluation concluded that noise walls did not meet federal or state policies to be built at project expense.

Other
When will Idaho 16 be improved between Idaho 44 and Emmett?
When will Idaho 16 be improved between Idaho 44 and Emmett?

ITD is planning to update the long-range plan for this section of Idaho 16. The department is also working with local jurisdictions to mitigate the impact of new development along the corridor. This may include small changes to the roadway. Additionally, the cities of Star and Eagle are currently collecting proportionate share costs from new developments to help fund major improvements in the future.

Other
Will Idaho 16 be like Eagle Road?
Will Idaho 16 be like Eagle Road?

No. Idaho 16 will be a limited-access expressway, unlike Eagle Road. Motorists will only be able to get on or off the new highway at I-84, Franklin, Ustick, 20/26 and 44. Driveways will not be permitted along the highway at any stage of this project.

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