As used in this article, the following terms shall have the meanings indicated:
That part of the roadway which is marked off or understood to be where pedestrians should cross.
Includes the driver or rider of a horse and the driver or operator of a bicycle, motorcycle or motor or other vehicle.
Includes any highway, driveway or public place set apart for the use of vehicles.
Includes all motor vehicles that run only upon rails or tracks.
Includes everything on wheels or runners.