放弃When a section of track is required for maintenance and trains cannot run, it is handed over by the operators to the engineers, who take "possession". Special protective measures are used to prevent access by unauthorised trains. When the track is returned to the operators, the engineers "give up possession".
" class="glossaryLink ">占有列车周围. 占用结束时，如果工程列车或轨道上的机器需要移动，则放弃列车周围的占用意味着放弃所有工作场地，以允许列车或机器移动。
