...issued under the laws of this state pertaining to the licensing of operators. (d) "Motor vehicle". Every self-propelled vehicle which is designed for use upon a highway, including trailers designed for use with such vehicles (except traction engines, road rollers, farm tractors, tractor...

...(d) Every self-propelled vehicle which is designed for use upon a highway * * * including trailers designed for use with such vehicles (except traction...tractor cranes, power shovels, and well drillers). • * * (g) Operator. Every person who is in actual or constructive physical control of a motor vehicle...