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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 30, 2026
Idaho students invited to ‘Name a Snowplow’ for 3rd year in a row
ITD is inviting 6-12 grade classrooms to help name 12 snowplows.
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September 30, 2026
Eastbound I-90 on-ramp from SH-41 to close for one week starting Friday
An upcoming eastbound on-ramp closure in Post Falls will re-route drivers to Seltice Way for access to the interstate for up to one week.
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September 30, 2026
Delays expected Wednesday night on SH-16
Expected delays on SH-16 tonight for girder placement on the Valnova Overpass project.
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