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Idaho
Speed Limits
Truck speed limits in Idaho: Highway 65 mph, Rural 80 mph, Urban 65 mph. Effective July 1, 2026 (HB 664, signed Mar 24, 2026): split speed limit eliminated; trucks may match car speeds — 80 mph on rural interstates, 65 mph on urban interstates. Left lane: No specific truck left-lane restriction.
Winter & Chain Laws
Chains required during winter conditions on designated mountain passes; ITD can require chains on any route during severe weather Construction: Construction season May-October; mountain passes may have limited hours for oversize loads.
Restricted Routes
Mountain passes require chain-up capability; standard oversize/overweight permits; some seasonal road closures
Hours of Service & ELD
Standard federal HOS enforcement; Idaho State Police CMV units ELD: Full federal ELD mandate compliance required.
Inspections & Enforcement
Moderate; ISP conducts roadside inspections at ports of entry Drug testing: Federal DOT drug testing requirements apply.
Parking Availability
Good; 147 spots per 100K truck miles; adequate truck stops along I-84 and I-86
Official Source
For the most current trucking regulations in Idaho, visit the official enforcement page at https://itd.idaho.gov/motor-carrier-services/.
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Moving to Idaho from elsewhere · Road Safety
Trucking regulations change frequently. Always verify current rules with the official state DOT or highway patrol before operating. This guide is for informational purposes only. Data reflects regulations as of early 2026.