m is a wheeled self-propelled mechanical vehicle.

The m driver's license is for wheeled bicycles, usually construction machinery with rubber tires, such as tire cranes, road rollers, harvesters, tractors, and some special construction machinery. Because there are many types of construction machinery vehicles using rubber tires, it is impossible to judge just from the appearance. The owner needs to refer to the vehicle's certificate to determine the type of vehicle. If it is marked as a wheeled bicycle, then he or she needs to obtain an M driver's license.