2001•Transportation Research Record Journal of the Transportation Research BoardRequires access

Smoothness Models for Hot-Mix Asphalt-Surfaced Pavements: Developed from Long-Term Pavement Performance Program Data

Harold L Von Quintus, Ahmed A. Eltahan, Amber Yau

Abstract

The results of a study conducted to determine the relationship between changes in the surface distress of flexible pavements and incremental changes in the international roughness index (IRI) or ride quality by using Long-Term Pavement Performance (LTPP) program data are presented. The results of the regression analyses completed to identify those distresses found to be important and related to incremental changes in the IRI were obtained under the sponsorship of NCHRP Project 1-37A (Development of the 2002 Guide for the Design of New and Rehabilitated Pavement Structures). The results from the study have shown that selected distresses do have a significant effect on incremental changes in IRI with time and traffic. The results summarized can be used for the management, design, or evaluation of pavement structures.

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Key concepts: International Roughness Index, Asphalt, Smoothness, Ride quality, Engineering, Asphalt pavement, Pavement management, Term (time)