Frequently Asked Questions

Commercial Services

What is a commercial motor vehicle?

According to Arizona Revised Statute 28-5201 (L08, Ch. 147, sec. 3), this is the definition of a commercial motor vehicle:

1. "Commercial motor vehicle" means a motor vehicle or combination of motor vehicles that is designed, used or maintained to transport passengers or property in the furtherance of a commercial enterprise on a highway in this state, that is not exempt from the gross weight fees as prescribed in section 28-5432, subsection B and that includes any of the following:

(a) A single vehicle or combination of vehicles that has a gross vehicle weight rating of eighteen thousand one or more pounds and that is used for the purposes of intrastate commerce.

(b) A single vehicle or combination of vehicles that has a gross vehicle weight rating of ten thousand one or more pounds and that is used for the purposes of interstate commerce.

(c) A school bus.

When do I need a USDOT number?

If you generate revenue through the transportation of your own property or the property of others (for-hire), perform a service that is a part of your business, or have a personal hobby that involves the use of a vehicle or combination of vehicles that has a gross vehicle weight rating (GVWR) of more than 10,000 pounds, you meet the definition of a motor carrier and must obtain a USDOT number.

You may need more than one type of USDOT number depending on the type of cargo, materials or passengers that you transport.

Please refer to the following related links for more information: