Arizona HOV lane rules require at least two people in the vehicle during weekday rush hours on Phoenix-area freeways, and driving solo during those windows carries a flat $200 civil penalty. Outside rush hours, anyone can use the lane. One recent change matters: electric and alternative fuel vehicles lost their solo-driver exemption on October 1, 2025.
When the Rules Apply
Restrictions are in force from 6 a.m. to 9 a.m. and 3 p.m. to 7 p.m., Monday through Friday.1Arizona Department of Transportation. High Occupancy Vehicle (HOV) Any other time, including weekends and holidays, the HOV lane works like a regular travel lane and you can use it solo.
HOV lanes exist only in metro Phoenix, running across I-10, State Route 202, and part of I-17 for a combined 42-plus miles. Tucson and the rest of the state have none.
Who Counts Toward the Two-Person Minimum
You need at least two people in the vehicle, counting yourself.2Arizona Legislature. Arizona Code 28-737 – High Occupancy Vehicle Lanes; Civil Penalty; Definition Age doesn’t matter. A baby in a car seat counts. A toddler counts. One child in the back is enough to make a parent legal in the HOV lane during restricted hours.
Who Can Drive Solo
A few vehicles can use the HOV lane during restricted hours without a passenger:2Arizona Legislature. Arizona Code 28-737 – High Occupancy Vehicle Lanes; Civil Penalty; Definition
- Motorcycles, with or without a passenger.
- Public transportation vehicles, whether operated by a public agency or under contract with one.
- Police, fire, and ambulance vehicles driven by first responders on duty.
- Tow trucks actively performing their duties.
Electric Vehicles No Longer Qualify
If you drive an EV or hybrid with an Alternative Fuel or Energy Efficient license plate, the old solo-driver exemption is gone. It expired on September 30, 2025, after Congress declined to extend the federal provision that let states offer it.3Arizona Department of Transportation. Federal Change Set for Oct. 1 Affects Electric Vehicle HOV Lane Access As of October 1, 2025, those vehicles need a second occupant during restricted hours just like any other car.1Arizona Department of Transportation. High Occupancy Vehicle (HOV)
What a Violation Costs
Driving solo in an HOV lane during restricted hours is a flat $200 civil penalty.2Arizona Legislature. Arizona Code 28-737 – High Occupancy Vehicle Lanes; Civil Penalty; Definition The statute labels it a civil penalty rather than a criminal fine, which is a meaningful distinction from a traditional moving violation. From the driver’s seat the stop looks the same: you pull over, get the citation, and owe the $200 if you were solo during restricted hours.
Crossing the Double White Line
Arizona HOV lanes are separated from general traffic by double white lines, and you can cross them to enter or exit as long as you meet the occupancy requirement during restricted hours. Crossing the line itself is not prohibited. That said, weaving in and out of the lane in heavy traffic draws attention, and an unsafe lane change can be cited on its own under general traffic laws.