Truck Accident Terms and Definitions

Semitrailer trailer supported at the rear by its own wheels and at the front by a fifth wheel mounted to a tractor or dolly. Cabover (Cab-Over-Engine, COE) Truck or tractor design in which the cab sits over the engine on the chassis. Dead-Heading Operating a truck without cargo. Yard Jockey Person who operates a yard tractor. TOFC (Trailer On Flatcar) Method of moving cargo which involves transporting semitrailers on railroad flat cars. Bobtail Tractor Tractor operating without a trailer. Also refers to straight truck. Bogie (also spelled bogey) Assembly of two or more axles, usually a pair in tandem. Brake Horsepower (bhp) Engine horsepower rating as determined by brake dynamometer testing. (see Horsepower) Kingpin Pin around which a steer axle's wheels pivot. PTO (Power Takeoff) Device used to transmit engine power to auxiliary equipment. Landing Gear legs which support the front of a semitrailer when it is not coupled to a tractor. GAWR (Gross Axle Weight Rating) Maximum weight an axle is rated to carry by the manufacturer. Includes both the weight of the axle and the portion of a vehicle's weight carried by the axle.

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	Did You Know?
	A Driver May Be On Duty For More Than 14 Hours. A driver may remain on duty for more than 14 hours; however, the driver cannot drive a CMV after the 14th hour after coming on duty. Also, the additional on-duty time will reduce on-duty time available under the 60/70-hour time limit.