1. vehicle width
car width, parallel to the longitudinal plane of symmetry of the vehicle and the distance between the two contact fixing projection plane sides against the vehicle part respectively, are simply two extremes in the car width direction the distance between the points. Wherein the fixed projecting portion does not contain the car side mirrors, side marker lamps, position-indicating lights, turn signals, fender flexible, foldable pedals, two slip like deformed portion and the contact with the ground. GB1589-2004 provisions, ranging from the vehicle width is greater than 2.5m, the width of the lane and highway driving speed related.