Arizona Vehicle and Traffic Laws: Licensing, Insurance, and DUI

Arizona vehicle and traffic laws live mostly in Title 28 of the Arizona Revised Statutes, and they work as a chain: how your vehicle is classified determines what license you need, what you must register, what insurance you must carry, and what penalties apply when something goes wrong. Miss a link early and the consequences compound.

How Arizona Classifies What You Drive

The statute draws a line between a “vehicle” and a “motor vehicle” that most people never notice. A “vehicle” is any device used to transport people or property on a public highway, but the definition specifically excludes electric bicycles, electric standup scooters, electric miniature scooters, human-powered devices, anything on stationary rails, personal delivery devices, and scrap vehicles. A “motor vehicle” is narrower still, covering self-propelled vehicles but carving out motorized wheelchairs, electric personal assistive mobility devices, electric bicycles, electric miniature scooters, electric standup scooters, motorized skateboards, scrap vehicles, personal delivery devices, and personal mobile cargo carrying devices.1Arizona Legislature. Arizona Revised Statutes Title 28 Section 28-101 – Definitions

Those exclusions are the point. If what you’re riding falls outside the “motor vehicle” definition, you’re not tied to registration, insurance, or a driver’s license under Title 28. That’s why a motorized wheelchair user drives freely and a car driver does not.

Within the motor vehicle category, a few narrower classifications come up often:

  • A motorcycle is a motor vehicle with a seat or saddle designed to travel on no more than three wheels. Tractors, electric bicycles, electric miniature scooters, electric standup scooters, and mopeds are specifically excluded.1Arizona Legislature. Arizona Revised Statutes Title 28 Section 28-101 – Definitions
  • A moped is essentially a bicycle with a helper motor: piston displacement of 50 cubic centimeters or less, no more than one and a half brake horsepower, and a top speed of 25 miles per hour on flat ground.1Arizona Legislature. Arizona Revised Statutes Title 28 Section 28-101 – Definitions
  • A bus is a motor vehicle designed to carry 16 or more passengers including the driver, which is what triggers a commercial license.1Arizona Legislature. Arizona Revised Statutes Title 28 Section 28-101 – Definitions
  • An electric bicycle has fully operable pedals and a motor under 750 watts, sorted into three classes: Class 1 assists only while pedaling and cuts off at 20 mph; Class 2 can propel the bike without pedaling but still cuts off at 20 mph; Class 3 assists only while pedaling and cuts off at 28 mph. Because e-bikes fall outside both statutory definitions, they need no registration, insurance, or license; the class mostly controls trail and path access.1Arizona Legislature. Arizona Revised Statutes Title 28 Section 28-101 – Definitions
  • An ATV, when operated on a public highway, is an off-highway vehicle 50 inches wide or less, 1,200 pounds or less without cargo, on three or more off-road tires. A recreational off-highway vehicle can run up to 80 inches wide and 2,500 pounds if it has a steering wheel, rollover protection, and occupant restraints.1Arizona Legislature. Arizona Revised Statutes Title 28 Section 28-101 – Definitions

Which License You Need

Arizona issues four license categories, and the class has to match the vehicle:2Arizona Department of Transportation. Driver License Classes and Types

  • Class G is the graduated license for drivers 16 to 17, covering any vehicle that doesn’t require a motorcycle or commercial license, with restrictions on nighttime driving and passengers.
  • Class D is the standard adult operator’s license, covering the same range without the graduated restrictions.
  • Class M is required for motorcycles and motor-driven cycles, either as a standalone license or an endorsement on a Class D.
  • Class A, B, or C is required for commercial vehicles: any vehicle or combination at 26,001 pounds or more, combinations towing a trailer over 10,000 pounds where the combined weight tops 26,001 pounds, vehicles carrying 16 or more passengers, or vehicles hauling placarded hazardous materials.

Registration and the Vehicle License Tax

Every motor vehicle, trailer, and semitrailer operated on an Arizona highway must be registered with the Arizona Department of Transportation for the current registration year.3Arizona Legislature. Arizona Revised Statutes Title 28 Section 28-2153 Arizona residents using a nonresident-owned vehicle must register it after seven months. Leased vehicles must be registered within 29 days.

The cost isn’t flat. Arizona calculates a vehicle license tax on an assessed value starting at 60 percent of the manufacturer’s base retail price and dropping 16.25 percent for each year the vehicle has been registered. The rate is $2.80 per $100 of assessed value for new vehicles and $2.89 per $100 for used vehicles, on top of an $8 registration fee, a $4 title fee, and a $1.50 air quality research fee.4Arizona Department of Transportation. How Are My AZ Vehicle Registration Fees Calculated A $30,000 new vehicle runs roughly $504 in the first year and less each year after.

Mandatory Insurance and What Uninsured Driving Costs

Every motor vehicle in Arizona must carry liability insurance at these minimums:5Arizona Legislature. Arizona Revised Statutes Title 28 Section 28-4009 – Motor Vehicle Liability Policy Requirements

  • $25,000 bodily injury per person
  • $50,000 bodily injury per accident for two or more people
  • $15,000 property damage

Driving without it escalates quickly. A first offense carries a minimum $500 civil penalty and a three-month suspension or restriction of your license. A second offense within 36 months raises the minimum to $750 and triggers a six-month suspension of license, registration, and plates. A third offense within 36 months costs at least $1,000, results in a one-year suspension, and requires filing proof of financial responsibility with the state before anything gets reinstated.6Arizona Legislature. Arizona Revised Statutes Title 28 Section 28-4135

Speed Limits and the Presumption Against You

Arizona’s basic speed law requires you to drive at a speed that is reasonable given actual road conditions, visibility, and hazards. You can be cited for driving too fast for conditions even when you’re under the posted limit.7Arizona Legislature. Arizona Revised Statutes Title 28 Section 28-701 – Reasonable and Prudent Speed

Exceeding these speeds creates a legal presumption that your speed was unreasonable:7Arizona Legislature. Arizona Revised Statutes Title 28 Section 28-701 – Reasonable and Prudent Speed

  • 15 mph near school crossings
  • 25 mph in business or residential districts
  • 65 mph everywhere else

The presumption matters. If you’re clocked at 70 in a 65 zone, the state doesn’t have to separately prove you were driving unsafely; the speed alone gets it there. You can argue that conditions made your speed reasonable, but the burden shifts to you.

Points, Suspensions, and DUI

Arizona assigns points to your driving record for moving violations:8Arizona Department of Transportation. Points Assessment

  • 8 points for DUI, extreme DUI, reckless driving, or aggressive driving
  • 6 points for leaving the scene of an accident, or failing to stop for a signal, stop sign, or yield sign when someone dies
  • 4 points for failing to stop for a signal, stop sign, or yield sign when someone is seriously injured
  • 3 points for speeding or driving over or parking in a gore area
  • 2 points for all other moving violations

Reach 8 points within any 12-month window and the state may require Traffic Survival School, or suspend your license for up to 12 months.8Arizona Department of Transportation. Points Assessment A single DUI conviction hits that threshold on its own.

The DUI thresholds themselves depend on what you’re driving. For standard passenger vehicles the limit is 0.08 percent blood alcohol. For commercial motor vehicles and vehicles for hire, including rideshare driving, the limit drops to 0.04 percent.9Arizona Legislature. Arizona Revised Statutes Title 28 Section 28-1381 – Driving or Actual Physical Control While Under the Influence A first DUI conviction is a class 1 misdemeanor, Arizona’s most serious misdemeanor classification. You can also be charged if you’re impaired to the slightest degree by drugs or alcohol, even below 0.08 percent.

Ignoring a Citation Makes It Worse

Skipping a court date or failing to pay a fine converts a small problem into a large one. The court can direct the Motor Vehicle Division to suspend your driving privileges.10Arizona Department of Transportation. Penalties – Driver Improvement In criminal traffic cases, a warrant can also be issued for your arrest.11AZ Court Help. Criminal Traffic Violations in Arizona A 3-point speeding ticket ignored long enough becomes a suspended license and potentially jail time.

Commercial Vehicles and DOT Numbers

If you cross state lines for commerce, the Federal Motor Carrier Safety Administration requires a USDOT number when your vehicles weigh over 10,000 pounds, when you transport between 9 and 15 passengers for compensation, when you carry 16 or more passengers, or when you haul placarded hazardous materials.12Federal Motor Carrier Safety Administration. Who Needs to Get a USDOT Number

Arizona’s intrastate threshold is higher. For in-state-only operations, the commercial motor vehicle definition generally applies to single vehicles or combinations with a gross vehicle weight rating of 26,001 pounds or more, or to any vehicle carrying placarded hazardous materials. If your operation stays inside Arizona and falls below those thresholds, you likely don’t need a DOT number. There is no charge to obtain one if you do.