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Popular Services & Guides
How we're improving Idaho
Our projects touch every corner of the state and boost quality of life for communities, travelers & visitors.
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I-90 Widening: SH-41 to US-95
The first project from the I-90 Corridor Study aims to improve safety and traffic volume capacity.
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I-15 Inkom Corridor
ITD is rebuilding I-15 structures at three locations in and near Inkom.
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US-20 Idaho Falls to Arco
Improvements are being planned for US-20 west of Idaho Falls to Arco. This important route leads to the Idaho National Laboratory, where more than 6,000 Idahoans are employed.
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I-84 South Jerome Interchange
Crews are working to replace the South Jerome Interchange. The interchange was originally built in 1966, and the new interchange will be a Divided Diamond/Couplet design.
Recent News
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September 25, 2026
More closures planned now and in October as ITD prepares for major I-90 traffic shift
Several significant traffic changes are on the horizon this fall for the I-90 corridor that will impact drivers between CDA and Post Falls.
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September 25, 2026
Sign installation to close southbound SH-16 Thursday between SH-44 and US-20/26
ITD continues work on the SH-16 extension.
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September 23, 2026
SH-53 Pleasant View Interchange to fully open Monday
After nearly 2 years of construction, the new SH-53 Pleasant View Interchange is set to open to traffic Monday.
Upcoming Events
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October 12, 2026 12:00 AM–11:59 PM MST
Columbus Day
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October 14, 2026 8:30 AM–3:00 PM MST
Transportation Board Meeting – Oct. 2026
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October 29, 2026 1:30 PM–3:00 PM MST
Dealer Advisory Board Meeting