道口安全是行车安全的一个重要窗口，亦是行车安全的一个薄弱环节，必须在认真加强管理、提高人员素质的同时，积极采用新技术、新设备，用科技进步的方法提高道口安全系数，才能从根本上确保道口安全。大中城市的一些道口，铁路、公路车流都十分繁忙，过早关闭栏木固然安全。? Crossing safety is an important window for driving safety and a weak link in driving safety. It is necessary to actively adopt new technologies and equipment and improve the safety factor at the crossing with scientific and technological progress, while seriously strengthening management and improving the quality of personnel. Fundamentally ensure the safety of crossing. Some large and medium-sized cities crossing, railways, highways and traffic are very busy, it is safe to close the fence early. ?