Uni-directional vehicle

A uni-directional vehicle is a vehicle that is normally designed to operate only in the forward direction. While the vast majority of road vehicles are like this, the term generally refers to a train or tram with a distinguishable front and rear end and a single operating cab at the front end. These vehicles often have the capability to operate in reverse, though such operations are limited to low speeds and short distances, such as shunting.

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