Truck Accident Terms and Definitions

Cabover (Cab-Over-Engine, COE) Truck or tractor design in which the cab sits over the engine on the chassis. AVL (Automated Vehicle Location) Class of technologies designed to locate vehicles for fleet management purposes and for stolen vehicle recovery Tandem Axle (Tandems) Pair of axles and associated suspension usually located close together. 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) Yard Jockey Person who operates a yard tractor. Kingpin Pin around which a steer axle's wheels pivot. 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. Dead-Heading Operating a truck without cargo. Landing Gear legs which support the front of a semitrailer when it is not coupled to a tractor. Hazmat Hazardous materials, as classified by the U.S. Environmental Protection Agency (EPA). Transport of hazardous materials is strictly regulated by the U.S. Department of Transportation.

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	Did You Know?
	Off-Duty Time At A Yard For Oil-Field Equipment Is Not Excluded From The 14-Hour Calculation. Off-duty time at a yard for oil-field equipment is counted toward the calculation of the 14-hour rule. Only waiting time at a natural gas or oil well site may be excluded from on-duty time.