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 18, 2026
Lower Lewiston Port of Entry closed for construction
The POE building is being renovated to improve commercial vehicle access and add public restrooms.
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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.
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