Vehicle operating speed.

车辆运行速度。

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The evident advantage is that the speed signal can easily be obtained on operating vehicle and no auxiliary connector is needed.

显著优点是，可方便地从整机上取得转速信号，而不需任何辅助连接件。

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This is where people put fake number plates on their vehicle so that if they're photographed by one of the thousands of speed cameras operating in Britain, they don't have to pay the fine because the camera's photographed the wrong number.

NPR: The Marketplace Report: U.K.'s Car Tracking System