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.