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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June 5, 2026
ITD to fully close Sandpoint pedestrian bridge indefinitely due to safety concerns
Due to safety risks, ITD is fully closing public access to the Long Bridge pedestrian until a full assessment is completed and repairs can be made.
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June 5, 2026
Construction resumes Monday on US-95 to build passing lane in Culdesac Canyon
Construction returns to US-95 near Culdesac as crews add a passing lane and complete environmental upgrades.
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June 4, 2026
Night work begins on US-30 bridge near New Plymouth on June 7
ITD continues bridge work throughout D3.
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