Standard Practice for Determination of International Roughness Index (IRI) to Quantify Roughness of Pavements

Published by	Publication Date	Number of Pages
AASHTO	N/A	5

Category: AASHTO

Description

AASHTO PP 37 – Standard Practice for Determination of International Roughness Index (IRI) to Quantify Roughness of Pavements

This practice describes a method for estimating roughness for a pavement section. An International Roughness Index (IRI) statistic is calculated from a single longitudinal profile measured with a road profiler in both the inside and outside wheelpaths of the pavement. The average of these two IRI statistics is reported as the roughness of the pavement section.