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 15, 2026
Northbound I-15 traffic shifts to begin between Northgate and Fort Hall interchanges
I-15 northbound traffic is about to move into the newly constructed three northbound lanes.
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May 15, 2026
Bridge maintenance to begin May 18 at I-84 and US-30 interchange
ITD continues bridge maintenance throughout the state.
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May 14, 2026
ITD urges public to respect safety restrictions on Long Bridge walking path
Repeated destruction of safety areas on the Long Bridge pedestrian path is making it difficult for ITD to maintain limited end-to-end access for pedestrians and cyclists while repair plans are made.
Upcoming Events
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May 21, 2026 1:00 PM– 3:00 PM MST
Negotiated Rulemaking Meeting 2026
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May 25, 2026 12:00 AM– 11:59 PM MST
Memorial Day
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June 16, 2026 8:00 AM –
June 17, 2026 5:00 PM MST
Transportation Board Meeting – June 2026