Standard Practice for Computing International Roughness Index of Roads from Longitudinal Profile Measurements

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

02-10-2021

Publisher

American Society for Testing and Materials

1.1This practice covers the mathematical processing of longitudinal profile measurements to produce a road roughness statistic called the International Roughness Index (IRI).

1.2The intent is to provide a standard practice for computing and reporting an estimate of road roughness for highway pavements.

1.3This practice is based on an algorithm developed in the International Road Roughness Experiment sponsored by a number of institutions including the World Bank and reported in two World Bank Technical Papers (1, 2).2 Additional technical information is provided in two Transportation Research Board (TRB) papers (3, 4).

1.4The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.

1.5This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Committee	E 17
DocumentType	Standard Practice
Pages	16
PublisherName	American Society for Testing and Materials
Status	Current
Supersedes	ASTM E 1926 : 2008 : R2015

ASTM E 1777 : 2009 : R2019	Standard Guide for Prioritization of Data Needs for Pavement Management
ASTM E 1448/E1448M : 2009 : R2015	Standard Practice for Calibration of Systems Used for Measuring Vehicular Response to Pavement Roughness
ASTM E 2133 : 2003 : R2020	Standard Test Method for Using a Rolling Inclinometer to Measure Longitudinal and Transverse Profiles of a Traveled Surface
ASTM E 867 : 2006 : R2020	Standard Terminology Relating to Vehicle-Pavement Systems
ASTM E 3028 : 2016 : EDT 1	Standard Practice for Computing Wheelchair Pathway Roughness Index as Related to Comfort, Passability, and Whole Body Vibrations from Longitudinal Profile Measurements

ASTM E 1364 : 1995 : R2023	Standard Test Method for Measuring Road Roughness by Static Level Method
ASTM E 1170 : 1997 : R2023	Standard Practices for Simulating Vehicular Response to Longitudinal Profiles of Traveled Surfaces
ASTM E 867 : 2023	Standard Terminology Relating to Vehicle-Pavement Systems
ASTM E 950/E950M : 2022	Standard Test Method for Measuring the Longitudinal Profile of Traveled Surfaces
ASTM E 1215 : 1993 : R2024	Standard Specification for Trailers Used for Measuring Vehicular Response to Road Roughness
ASTM E 1082 : 1990 : R2024	Standard Test Method for Measurement of Vehicular Response to Traveled Surface Roughness
ASTM E 1170 : 1997 : R2017	Standard Practices for Simulating Vehicular Response to Longitudinal Profiles of Traveled Surfaces
ASTM E 1364 : 1995 : R2017	Standard Test Method for Measuring Road Roughness by Static Level Method
ASTM E 1215 : 1993 : R2017	Standard Specification for Trailers Used for Measuring Vehicular Response to Road Roughness
ASTM E 950/E950M : 2009 : R2018	Standard Test Method for Measuring the Longitudinal Profile of Traveled Surfaces with an Accelerometer-Established Inertial Profiling Reference
ASTM E 1656/E1656M : 2011 : R2016	Standard Guide for Classification of Automated Pavement Condition Survey Equipment (Withdrawn 2022)
ASTM E 1082 : 1990 : R2017	Standard Test Method for Measurement of Vehicular Response to Traveled Surface Roughness