Glossary of Tractor Trailer Wreck Terms

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BBC: Distance from a truck's front bumper to the back of its cab.

Bill of Lading: Itemized list of goods contained in a shipment.

Blind Spot: Areas around a commercial vehicle that are not visible to the driver either through the windshield, side windows or mirrors.

Bobtail: 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)

Bridge Formula: A bridge protection formula used by federal and state governments to regulate the amount of weight that can be put on each of a vehicle's axles, and how far apart the axles (or groups of axles) must be to legally carry a given weight.