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正线

正线,也称主线本线(英語:Mainline),相对应的概念为支线副线,指与鐵路軌道连接区间并且贯穿或伸入车站线路。一般而言正线多为直股,但其确定依据主要还是靠人为设定和历史传统,因而从道岔引出的侧向股道也有可能是正线;如京广铁路长阳村线路所上行道岔侧向线路(连接丰台站)被定为正线,而道岔直向线路被定为联络线(连接北京西站)。中国铁路车站内,正线的编号用罗马数字标示。

辨析

正线是属于车站管内的线路。列车从区间进入正线通过或停车,必须越过进站信号机,必须得到车站值班员的允许。因此,正线对应的英文表示应为running line或through route。而干线对应于英文的mainline,干线是与支线相对的概念。正线是与站线、段管线、岔线、安全线及避难线等相对的概念。[1]站线是在车站管内到发线货物线调车线牵出线、及站内的指定用途的其他线(机走线、机待线、车辆站修线、驼峰迂回线、驼峰禁溜车停留线、加冰线等等)。

参考文献

  1. ^ 中国铁路《技规》第32条 铁路线路分为正线、站线、段管线、岔线、安全线及避难线。

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