Idle Reduction and Alternative Fuel Vehicle Weight Exemption
Any motor vehicle equipped with an auxiliary power unit or other idle reduction technology may exceed the gross, single axle, tandem axle, or bridge formula weight limits by up to 550 pounds (lbs.) to compensate for the added weight of the idle reduction technology. Furthermore, any natural gas or electric vehicle may exceed the limits by up to 2,000 lbs. To be eligible for the weight exemption, certification of the weight of the auxiliary power unit or proof that the vehicle operates on natural gas, and a demonstration that the vehicle is fully functional must be available to law enforcement officials.
(Reference Virginia Code 46.2-1129.1 through 46.2-1129.2)