1.1本规程适用于道路表面轮廓的处理，以计算与轮廓粗糙度相关的单个数值指标。 1.2假设根据适用试验方法测量的表面轮廓数据记录。数据记录可以是高程、坡度或加速度的表示。 1.3定义了计算纵断面记录长度或记录指定小节索引的程序。 1.4本规程仅涵盖计算程序，未规定或定义轮廓指数加权函数的形式，除非要求指数以表面轮廓的“均方”或“均方根”测量值的形式表示。 计算出的指数的数值将取决于所使用的权重和窗口函数。使用的加权函数可以包含任何线性数学运算，例如常数乘法、微分或积分。不包括使用非线性操作获得的措施，如校正。

1.1 This practice is applicable to the processing of road surface profiles for the purpose of computing a single numerical index related to the roughness of a profile. 1.2 A data record of the surface profile, measured according to an applicable test method, is assumed. The data record may be a representation of either elevation, slope, or acceleration. 1.3 Procedures are defined for computing the index over the length of the profile record, or over specified sub-sections of the record. 1.4 This practice covers only the computation procedures and does not specify or define the form of the profile index weighting function except in the requirement that the index be expressed in the form of either a "mean square" or "root mean square" measure of the surface profile. The numerical value of the computed index will depend on the weighting and window functions used. The weighting function used can incorporate any linear mathematical operation, such as multiplication by a constant, differentiation, or integration. Measures obtained using nonlinear operations, such as rectification, are not covered.