Truck Accident Terms and Definitions

Fixed Tandem Assembly of two axles and suspension that is attached to the chassis in one place, and cannot be moved fore and aft 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. 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. Kingpin Pin around which a steer axle's wheels pivot. Semitrailer trailer supported at the rear by its own wheels and at the front by a fifth wheel mounted to a tractor or dolly. PTO (Power Takeoff) Device used to transmit engine power to auxiliary equipment. LTL Carrier company which consolidates less-than-truckload cargo for multiple destinations on one vehicle. Cabover (Cab-Over-Engine, COE) Truck or tractor design in which the cab sits over the engine on the chassis. 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.

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	Did You Know?
	Raising The Number Of Driving Hours Save Lives. The longer off-duty time allows drivers to have more regular schedules and increases the potential for quality sleep. This is consistent with fatigue- and sleep-related studies considered in development of the rule that indicate the amount and quality of sleep a person receives has a strong influence on alertness.