Ground－Down有限公司生产的临时轨道桥可在维修人员安装新轨道之前让列车以高达10mph的速度走过一段损坏的轨道。制造商称．该装置可以减少列车晚点以及列车晚点所引起的阻塞．减少乘务员的开支。由重量轻的高合金钢制成的临时轨道桥可以由一组人员在数分钟内快速安装好。临时 Ground-Down Limited’s temporary track bridge allows trains to pass a damaged track up to 10 mph before service personnel install new tracks. The manufacturer said. The device can reduce the late train delays and obstruction caused by the train. Reduce flight attendants’ expenses. A temporary track bridge made of light-weight, high-alloy steel can be quickly installed by a group of people in minutes. temporary