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 1, 2026
Look twice for motorcycles as riding season begins
May is Motorcycle Safety Awareness Month. The reminder to safely share the road comes as Idaho continues to see increases in motorcycle-related deaths and injuries.
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May 1, 2026
Overnight closures planned for next week on I-84 between Garrity and Ten Mile
ITD continues work on Idaho's newest highway.
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May 1, 2026
I-90 ramp closures and detours in CDA start Monday
Week-long ramp closures at US-95 and Northwest Boulevard will encourage drivers to use alternate access to I-90.
Upcoming Events
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May 7, 2026 8:00 AM– 9:00 AM MST
Transportation Board Adjustments Subcommittee – May 2026
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May 13, 2026 8:00 AM –
May 14, 2026 5:00 PM MST
Transportation Board Meeting – May 2026
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May 13, 2026 8:30 AM– 12:00 PM MST
Trucking Advisory Council Meeting