To offer more information to the traffic lights controller, the concept of the instantaneous stop delay is defined and the corresponding measuring method is developed.

为了给交通灯控制提供更准确的信息，提出了瞬时停车延误的基本概念和量度方法。

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But the overall air system's safety is built on redundancy, and taking away the controller's extra set of eyes is like removing stop signs or traffic lights from city intersections and forcing drivers to be more vigilant and cautious, says Paul Rinaldi, president of the National Air Traffic Controllers Association.

NPR: FAA To Close 149 Air Traffic Towers Under Cuts