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A prevent defense

机译:预防防守

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摘要

Grade-crossing technology can be as complex as a device that measures changes in the earth's gravitation, or as simple as an exit gate that doesn't lower as a train approaches, permitting a trapped vehicle to escape a four-quadrant-gated crossing. "You have to look at what best fits a crossing and use the technology avail able,"says Robert Boileau, Burlington Northern Santa Fe assistant vice president, engineering services.
机译:平交道口技术可以像测量地球引力变化的设备一样复杂,也可以像不会随着火车走近而降低的出口一样简单,允许被困车辆逃脱四象限闸口。 Burlington Northern Santa Fe工程服务部副总裁Robert Boileau表示:“您必须查看最适合交叉口的设备,并使用可用的技术。”

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