铁路道口的安全、通过效率一直存在一些问题,主要是因为目前所用的道口安全控制系统在灵活性和可靠性方面难以协调一致。针对这种状况,本文提出了基于PLC的铁路道口安全控制系统,研究了PLC安全控制系统的实现方案,并阐明它的科学性和可行性-Railway crossing safety, efficiency, there are some problems, mainly because of the difficult coordinated crossing safety control system currently used in the flexibility and reliability. Of this situation, the PLC-based railway crossing safety control system, PLC safety control system, and to clarify its scientific and practical