Idaho Oversize Permits are valid for 5 days.
Travel is allowed one-half hour before sunrise to one-half hour after sunset, including Saturdays and Sundays (majority of routes). Up to and including 10′ wide, 120′ long or 14’6 high, travel is allowed 24/7 (majority of routes) with lighting as specified on the Idaho oversize permit. Weekend travel is allowed on the majority of routes during daytime hours.
If the load is over 13′ wide, movement is prohibited between 6:30 a.m. – 8:30 a.m., and 4:00 p.m. – 6:00 p.m. in most major cities. Holiday travel restrictions depend on dimension and route.
Speed Limit
Interstate 70 mph. Non-interstate 65 mph. Unless otherwise specified on permit.
The vehicle must have the following characteristics:
*Note: Several 2-lane highways in Idaho are non-designated, including US-12 except in the Lewiston to Spalding, US-93 from Salmon to Challis, and US-95 from Council to Grangeville. For divisible loads, trailers exceeding 48’ are only allowed with an annual extra length permit, and the tractor-trailer off-track measurement must not exceed 5’6″ (3.00 on a few mountain routes). Non-divisible loads are covered by a single or annual permit, without regard to off-track amount.
Note*: Group weight maximums depend on route classification, with Interstate routes getting the highest. Loads exceeding these dimensions are considered Super Loads.
“Oversize Load” signs are required on all permit loads. Flags are required on all four corners and extremities of oversized loads.
Get Your Permit Today
Call: 224-998-3880