License/Prorate/Fuel: Arizona is a member of the IRP and IFTA.
Intrastate Authority: Arizona is de-regulated. You do not need any additional permits for intra-Arizona loads.


Permits valid for four days. Drivers have the option of purchasing permits at most Ports of Entry or online at Arizona Department of Transportation


Daylight hours, (one-half hour before sunrise to one-half hour after sunset). Loads/vehicles not over 10' wide or 14'6” high or not over 10' rear overhang are allowed continuous travel. Loads not over 16' wide, 16' high, 120' long and 250,000 pounds may travel on Interstate and specified state routes at night, and from 3:00 a.m. to 12:00 noon on weekends (except on holiday weekends and in curfew areas), but this must be requested when permit is ordered and must be stated on the permit.

**Note: Loads over 11' wide will be required to have one escort to travel from 3 a.m. to noon on weekends, and loads 15' high and over will need an additional escort with height pole.


No O/D or O/W loads allowed on I-17, I-10 and SR 60 within city limits of greater Phoenix area, or I-10 or I-19 within city limits of greater Tucson area between hours of 7:00 – 9:00 a.m. and 4:00 – 6:00 p.m. weekdays. Local "Courtesy Permit"/route approval is required for O/D travel within Phoenix and Tucson.


Width: 8'6" Height: 14' Length: 57' trailer on Interstate. On non-designated roads, 65' overall for over 53' semi-trailer. Overhang: 3' front, 6' rear. Weight: 80,000 Gross Single – 20,000 Tandem – 34,000 Tridem – 42,000


Width: 14' Height: 16' Length: 120' Weight: Tandem – 46,000* Tridem – 51,450–53,974* Single – 28,000 *(Tandem and Tridem weights may vary depending on axle spacing’s, and axle width. For example, a tridem with 9' of axle spacing (4'6 + 4'6) and 8'0 axle width gets 51,450). Note: A "Class C Tridem Permit" can now be obtained to allow 59,168 pounds at 9' of Tridem axle spacing (57,960 at 8', 60,000 at 10'). However, this is only for travel on Interstates 10, 19 and 40, and for the portions of SR68 and US93 connecting I-40 and the Nevada line. Any other (including detour) routes will disqualify you. Over 14' wide, 16' high, 120' long and 250,000 requires a "Class C". A route survey may be required.


Width: over 14'– 1 or more escorts. Some restricted routes require 2 escorts over 12' wide and a few for over 10' wide. Height: over 16' – 1 or more escort. Length: over 120' – 1 or more escort. Overhang: Front or Rear over 20' – 1 escort.

Again, loads over 11' wide will be required to have one escort to travel from 3 a.m. to noon on weekends, and loads 15' high and over will need escort with height pole.


Bulldozer blades and arms over 14' wide (measured at right angles to the trailer axis) shall be detached and hauled in a manner to not create a safety hazard. Dozer blades shorter than 14' wide may be hauled without being detached provided the dozer is firmly supported. If buckets, blades, counterweights, etc., are easy to remove, they must be removed, but can be hauled with the load. Blade can be detached and hauled with the dozer on same trailer if the load would be overweight with or without the blade, but it must be stated on the permit. On wide loads, side mirrors must extend far enough to avoid view being blocked by the load.


All overwidth vehicles or loads exceeding 9' in width shall display “Oversize Load” signs. All overwidth loads and vehicles must be flagged with red flags 12" square or larger on extremities. Any front or rear overhang must be flagged or lighted. Up to 10' overhang may travel at night, but must be lit and flagged. There are no sign or flag requirements for overheight only or overweight only loads.

Note on Overweight Permits in AZ: Arizona scales expect permit weights to be very close to actual weights and dimensions. You can buy the permit at the scales to avoid problems, or else make sure you are ordering accurate weights!

Arizona DOT office and permit contact information:

Arizona Motor Vehicle Division (ADOT)
1225 N 25th Avenue
Phoenix, AZ 85009
Telephone: 602-771-2960
Office hours: 8 AM until 5PM Monday – Friday.
Arizona observes Mountain Time.
Website: Arizona DOT permits.
Notes: For class C permits: 602-712-8176 or 602-712-8280.

All laws, regulations, rules and limitations are now set fourth in: Arizona transportation-permit laws.