铁路道口安全是行车安全的一个薄弱环节。目前，对站外各类平交道口已作了大量研究并采取了各种技术措施，而对站内平过道的安全至今尚无较先进的技术设备。随着我国铁路运输开始全面提速和开行快速列车，对于高速高密度的繁忙干线来讲，干线内主要客运站的干过道的安全尤为重 Railroad crossing safety is a weak link in driving safety. At present, a great deal of research has been done on all kinds of crossroads outside the station and various technical measures have been taken. However, there is not any more advanced technical equipment for the safety of the overpass at the station. As China’s railways have begun to speed up in full scale and opened fast trains, the safety of the dry corridors at the major passenger terminals in the trunk lines is particularly high for high-speed and high-density busy trunk lines