Passenger Vehicles:
Class 1 - 2-Axle Passenger Vehicles
passenger car light truck van motorcycle (with or without sidecar)
Class 1 - Commercial Vehicles any Class 1 vehicle with commercial licenses plates, including taxis, hearses, and 2-axle limousines
Trucks:
Class 2 - 3 to 5 axle vehicle any Class 1 vehicle with a 1, 2 or 3 axle trailer any Class 1 vehicle with a 1, 2 or 3 axle unit that straddles the vehicle body a 3 or 4 axle RV with single wheels a 3 or 4 axle limousine
Class 3 - 5 to 9 axle truck tractor-trailer, car carrier or truck with 5 to 9 axles
Class 4 - not used
Class 5 any 2 axle vehicle with dual rear tires, including tow trucks
Class 6 tractor, tractor-trailer, truck or RV with dual wheels and 3 axles
Class 7 car carrier, truck, tractor-trailer, RV or any vehicle with dual wheels and 4 axles
Class 9 5 to 12 axle tandem-trailer (Double Bottom)
Bus:
Class 8 any two or three-axle bus used to carry 15 or more passengers