Pavement Management Performance Modeling: Evaluating the Existing PCI Equations

Project Details
STATUS

Completed

PROJECT NUMBER

13-455

START DATE

04/02/13

END DATE

12/31/14

RESEARCH CENTERS InTrans, CTRE
SPONSORS

Federal Highway Administration State Planning and Research Funding
Iowa Department of Transportation

Researchers
Principal Investigator
Omar Smadi

Director, CTRE

Co-Principal Investigator
Fatih Bektaş

Associate Scientist, CTRE

About the research

This project included the activities required for the evaluation, development, and enhancement of the Iowa Department of Transportation (DOT) pavement condition information as part of their pavement management system operation. The study covers all of the Iowa DOT’s interstate and primary National Highway System (NHS) and non-NHS system.

A new pavement condition rating system that provides a consistent, unified approach in rating pavements in Iowa is being implemented. The proposed 100-scale system is based on five individual indices derived from specific distress data and pavement properties, and an overall pavement condition index, PCI-2, that combines individual indices using weighting factors.

The different indices cover cracking, ride, rutting, faulting, and friction. The Cracking Index is formed by combining cracking data (transverse, longitudinal, wheel-path, and alligator cracking indices). Ride, rutting, and faulting indices utilize the International Roughness Index (IRI), rut depth, and fault height, respectively.

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