1.1本规程涵盖了由以交通速度运行的设备进行的纵断面测量的数学处理，以产生主观行驶质量的估计，称为行驶次数（RN）。 1.2本规程旨在为公路社区提供一种标准规程，用于计算和报告根据纵断面测量得出的公路路面主观行驶质量估计值。 1.3本实践基于国家公路合作研究项目（NCHRP）1-23（1,2）、俄亥俄州交通部两个行驶质量研究项目（3和4）中开发的算法，以及参考文献（5）和（6）中提出的其他工作。 1.4在NCHRP研究项目1-23（1和2）中，本实践产生的主观行驶质量计算估计被命名为RN，以区别于根据纵断面计算的其他行驶质量测量。 9.2中的等式1表示RN的数学定义。 1.5本标准无意解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。

1.1 This practice covers the mathematical processing of longitudinal profile measurements made by equipment that operates at traffic speeds to produce an estimate of subjective ride quality, termed Ride Number (RN). 1.2 The intent of this practice is to provide the highway community a standard practice for the computing and reporting of an estimate of subjective ride quality for highway pavements from longitudinal profile measurements. 1.3 This practice is based on an algorithm developed in National Cooperative Highway Research Project (NCHRP) 1-23 (1,2), two Ohio Department of Transportation ride quality research projects (3 and 4), as well as additional work presented in Refs (5) and (6). 1.4 the computed estimate of subjective ride quality produced by this practice was named RN in NCHRP Research Project 1-23 (1 and 2) to differentiate it from other measures of ride quality computed from longitudinal profile. Equation 1 in 9.2 represents the mathematical definition of RN. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.