1 - A motorcycle is a vehicle with two wheels, with or without a sidecar, with a propulsion engine with a cylinder capacity of more than 50 cm3, in the case of an internal combustion engine, or which, by construction, exceeds a maximum speed of 45 km/h or whose maximum power exceeds 4 kW.

2 - A moped is a vehicle with two or three wheels, with a maximum design speed not exceeding 45 km/h, and whose engine:

a) In the case of two-wheel mopeds, the maximum power does not exceed 4 kW and in the case of a spark-ignition engine has a cylinder capacity not exceeding 50 cm3;

b) In the case of three-wheel mopeds, the maximum power does not exceed 4 kW and the engine capacity does not exceed 50 cm3 in the case of a spark ignition engine, or 500 cm3 in the case of a compression ignition engine.

3 - A tricycle is a vehicle with three symmetrically arranged wheels which, by design, exceeds a top speed of 45 km/h, or has a propulsion engine with a maximum power exceeding 4 kW, or has a cylinder capacity exceeding 50 cm3 in the case of a spark ignition engine, or 500 cm3 in the case of a compression ignition engine.

4 - Quadricycle is a vehicle with four wheels, classified as:

a) Light - a vehicle with a maximum speed, on the ground and by construction, of no more than 45 km/h, whose unladen mass does not exceed 425 kg, excluding the mass of the batteries in the case of electric vehicles, and with an engine capacity of no more than 50 cm3 in the case of a spark-ignition engine, or 500 cm3 in the case of a compression-ignition engine;

b) Heavy - a vehicle whose unladen mass, excluding the mass of the batteries in the case of electric vehicles, does not exceed 450 kg or 600 kg, depending on whether it is intended for the carriage of passengers or goods.