本文件定义了轨道几何参数，并规定了轨道几何测量的最低要求和轨道几何质量的评估方法。 本文件适用于1435？毫米和更宽的轨距。城市/轻轨系统、电车轨道和任何小于1？的轨距435？mm不在本文件范围内，但可作为参考。

This document defines track geometry parameters and specifies the minimum requirements for track geometry measurements and the evaluation method for track geometry quality. This document is applicable to 1 435 mm and wider track gauges. The urban/light rail systems, tramways and any track gauge narrower than 1 435 mm are excluded from the scope of this document, however it can be used as a reference.