vehicle exhaust gas(An aeriform fluid of fine particles suspended in air, produced and vented as a byproduct of the operation of wheeled machines or conveyances self-propelled by internal combustion engines)
vehicle inspection(An official periodical examination of an automobile, truck, boat, airplane or other means of conveyance to determine compliance in design or operation with legal standards for safety or pollution emissions)
vehicle manufacturing industry(A sector of the economy in which an aggregate of commercial enterprises is engaged in the manufacture and sale of equipment that conveys people, goods or materials by land, air or water)