自动级过境点 包括Automatic Half Barrier Crossing." class="glossaryLink ">AHBC那" class="glossaryLink ">ab那" class="glossaryLink ">Aocl.和Automatic Open Crossing – remotely monitored" class="glossaryLink ">a水平过境点以及由微型红色/绿色警告灯保护的人 0.
