| 摘要 |
System, method and program for sensing and controlling spacing between railroad trains. A first train broadcasts its identity and current time of day to an RFID mounted adjacent to a railroad track approximately when the first train reaches the RFID. In response, the RFID records the identity of the first train and the time of day approximately when the first train reached the RFID. The first train proceeds past the RFID. Subsequently, a second train on the railroad track reaches the RFID and reads from the RFID the identification of the first train and the time of day approximately when the first train reached the RFID. Based on a comparison to the time of day approximately when the first train reached the RFID as read from the RFID to a time of day approximately when the second train reached the RFID, a determination is made as to a time-spacing between the first and second trains. If the time-spacing is below a threshold, an operator of the second train may be alerted.
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