Slow down for Work Zones
Learn more about driving safely in road construction & maintenance work. Stay alert & be careful throughout a work zone.
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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SH-16 Construction
SH-16 will improve regional mobility, provide access to I-84 in the rapidly growing central Treasure Valley, and improve commutes for thousands of motorists.
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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.
Recent News
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May 22, 2026
I-15 West Inkom Interchange to temporarily close for several weeks for ongoing construction
Beginning Tuesday, the west Inkom interchange will be closed for three weeks.
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May 21, 2026
Island Park traffic signal installation delayed until later this summer
Modifications to foundation and signal pole components are required before installation can continue at the intersection of US-20 and Yale Kilgore Road in Island Park.
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May 21, 2026
SH-44 between Moyle Ave and Short Rd traffic shift starts May 26
Traffic shift at SH-16 and SH-44 will effect morning commutes.
Upcoming Events
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June 16, 2026 8:00 AM –
June 17, 2026 5:00 PM MST
Transportation Board Meeting – June 2026
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June 19, 2026 12:00 AM– 11:59 PM MST
Juneteenth
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June 24, 2026 8:00 AM –
June 26, 2026 5:00 PM MST
ACE Academy 2026