Nevada OSOW permits

Permits valid for five days. Must have a permit prior to entering the state.

Nevada permitting system:

Contact phone number: 1-800-552-2127 / 1-775-888-7410


One-half hour before sunrise to one-half hour after sunset, plus the following exceptions: Loads not exceeding 12 wide, 15' high, 110' long are permitted for night travel. Loads not exceeding 14' wide, 15' high, 110' long, are permitted for weekend travel except in restricted areas noted in the next section.


For loads exceeding 12' wide, 15' high, 110' long, no weekend travel is allowed on I80 between Sparks and California line or on I-15 between Las Vegas (exit 33) and California line. There are no weekday curfews for Las Vegas, Reno, or other cities. Holiday travel is usually permitted for loads not exceeding 12 wide, 15' high, 110' long.


Width: 8'6"

Height: 14'

Length: 53' semi-trailer, 75'maximum length (including rear overhang)

Overhang: 10', (as long as length including overhang does not exceed 75').

Weight: 80,000 Gross Single – 20,000 Tandem – 34,000 Tridem – 42,000


Width: 17'

Height: 16'

Length: 105' No maximum overhang if on permitted load.

Weight: * (5 axles) * (6 axles) * (7 axles) *Depends on spacings Single – 20,000* Tandem – 46,725* Tridem – 58,000 to 59,000* *Depends on spacings Note: 58,000-59,000 pounds is the tridem "bonus weight" in Nevada and is now allowed on one or two tridems. Additional tridems would get around 51,000 pounds. A Tridem drive on a tractor can be permitted for the bonus weight (as one of the two tridems) as long as the spacing from the steer axle to the center of middle drive axles is at least 18 feet. Loads in excess of these dimensions are reviewed on an individual basis only.


On Interstate and 4 or more lane highways:

Width: Over 14' – 1 escort; over 16' – 2 escorts; over 17' – may require 2 escorts and Highway Patrol.

Height: Over 15'6" – 1 high-pole escort

Length: Over 105' – 1 escort

Overhang: Over 25' rear – 1 escort

On 2-lane highways:

Width: Over 12' – 1 escort; over 14' – 2 escorts; over 16' – 3 escorts, over 17' – reviewed on an individual basis, may require 2 escorts and Highway Patrol. Hoover Dam area: width 8'6" to 10' (maximum allowed) – 2 escorts.

Height: Over 15'6" – 1 high-pole escort

Length: Over 105' – 1 escort

Overhang: Over 25' – 1 escort


All vehicles in excess of 8'6" width must display "Oversize Load" signs front and rear. Headlights must be on low beam. Signs shall only be displayed when necessary. Over 4' overhang should display the flag.


You must have a Nevada Light Permit to run flashing revolving amber warning light(s) or even to travel with it turned off but uncovered. This permit is available in Missoula and can be faxed to you. If you do not have a current amber light permit, the light must be covered (or removed) or you can be ticketed.


Spring thaw weight restrictions exist on some secondary routes approximately February through April. Check with the Sammons Permit Office if you may be using non-primary routes.

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