Alternative Fuel Vehicle and Idle Reduction Weight Exemption

A vehicle powered in whole or part by natural gas, electricity, or hydrogen may exceed the state’s gross and axle weight limits by up to 2,000 pounds (lbs.), equal to the difference between the weight of the vehicle with the natural gas tank, battery, or hydrogen fueling system and the weight of a comparable diesel tank and fueling system. The exemption is allowed on all state roads and interstate highways, as defined in Title 23 of the U.S. Code section 127(s).

Any vehicle equipped with idle reduction technology may exceed the state’s gross vehicle weight limits by up to 400 lbs. to compensate for the additional weight of the idle reduction technology. The additional weight may not exceed the actual certified weight of the idle reduction unit. Upon request, vehicle operators must provide proof or certification of the weight of the idle reduction technology and proof that the idle reduction technology is fully functional.

(Reference Oklahoma Statutes 47-14-109, 47-14-109.3, and 47-14-109.4)