1. Scope

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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

E867 Terminology Relating to Vehicle-Pavement Systems

E950 Test Method for Measuring the Longitudinal Profile of Traveled Surfaces with an Accelerometer Established Inertial Profiling Reference

E1170 Practices for Simulating Vehicular Response to Longitudinal Profiles of Traveled Surfaces

E1364 Test Method for Measuring Road Roughness by Static Level Method

E1500 Practice for Computing Mean Square Numerics from Road Surface Elevation Profile Records

E1656 Guide for Classification of Automated Pavement Condition Survey Equipment

E1927 Guide for Conducting Subjective Pavement Ride Quality Ratings

Keywords

longitudinal profile; mean panel ratings (MPR); panel rating; pavement ride quality; profile index; rideability; ride number (RN); subjective ride quality; subjective ride quality estimate; Inertial measurement; Longitudinal profile; Mean panel rating (MPR); Pavement ride quality; Ride number (RN); Subjective ride quality;

ICS Code

ICS Number Code 93.080.99 (Other standards related to road engineering)

DOI: 10.1520/E1489-98R03

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