Arizona

Idle Reduction Requirement - Maricopa County

Heavy-duty diesel vehicles operating in Maricopa County with a gross vehicle weight rating of more than 14,000 pounds must limit idling time to no more than five minutes. Exemptions apply for emergency vehicles, certain traffic or weather conditions, driver accommodations, and idling necessary for refrigeration equipment. (Reference Arizona Revised Statutes 11-876 and Maricopa County Vehicle Idling Restriction Ordinance)

School Bus Idle Reduction Pilot Program

As part of the Children's Environmental Health Project, the Arizona Department of Environmental Quality (ADEQ) runs the School Bus Idling Pilot Program to reduce bus idling near schools. ADEQ has worked with school districts to develop a draft bus idling policy. Key elements in the draft policy include: having drivers turn off buses upon reaching a school or other location and not turn on the engine until the vehicle is ready to depart; parking buses at least 100 feet from a school air intake system; and posting appropriate signage advising drivers to limit idling near the school.

Idle Reduction Weight Exemption

A heavy-duty vehicle that is equipped with qualified idle reduction technology may exceed the Arizona weight limitations specified in Arizona Revised Statutes 28-110A by up to 400 pounds or the weight of the idle reduction technology, whichever is less. (Reference Senate Bill 1320, 2009, and Arizona Revised Statutes 28-1100)