Truck Accident Terms and Definitions

Tandem Axle (Tandems) Pair of axles and associated suspension usually located close together. Kingpin Pin around which a steer axle's wheels pivot. 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) Fixed Tandem Assembly of two axles and suspension that is attached to the chassis in one place, and cannot be moved fore and aft PTO (Power Takeoff) Device used to transmit engine power to auxiliary equipment. Sliding Tandem (Slider) Mechanism that allows a tandem axle suspension to be moved back and forth at the rear of a semitrailer, for the purpose of adjusting the distribution of weight between the axles and fifth wheel. Cabover (Cab-Over-Engine, COE) Truck or tractor design in which the cab sits over the engine on the chassis. GVW (Gross Vehicle Weight) Total weight of a vehicle and everything aboard, including its load. Semitrailer trailer supported at the rear by its own wheels and at the front by a fifth wheel mounted to a tractor or dolly. LTL Carrier company which consolidates less-than-truckload cargo for multiple destinations on one vehicle.

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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.