When a semi-truck drives without a trailer, it’s said to be bobtailing. Tractor-trailer rigs often do this after dropping off a trailer or when going somewhere to pick one up. Sometimes truck drivers will use their tractors for personal transportation when they aren’t on the job. Although this practice seems harmless enough, tractors by themselves are very poor at hard braking and very difficult to control on slippery roads. There’s nothing illegal about the practice, and trucking wouldn’t be possible without bobtailing. Why a Bobtailing Truck Brakes and Handles So Poorly.

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