The University of Massachusetts Amherst
University of Massachusetts Amherst

Search Google Appliance

Links

Estimation of pavement crack initiation models by combining experimental and field data

TitleEstimation of pavement crack initiation models by combining experimental and field data
Publication TypeJournal Article
Year of Publication2013
AuthorsReger D, Christofa E, Guler I, Madanat S
JournalJournal of Infrastructure Systems
Volume19
Issue4
Start Page434
Pagination434-441
Date Published12/2013
ISSN1076-0342
KeywordsCracking, Joint estimation, Pavements, Stochastic duration models
Abstract

Development of deterioration models for pavements is an essential part of maintenance and rehabilitation planning. Often, when pavement-deterioration models are developed for developing countries or states that do not have regularly scheduled condition surveys, the only available data are experimental. Experimental data sets fail to include environmental variables and cannot capture properly the aging process of pavements, so the estimated models suffer from biases. This paper describes the development of a pavement-crack-initiation model by combining experimental and field data to correct for such biases. The American Association of State Highway Officials (AASHO) Road Test is used as the experimental data set, which is combined with field data from the Washington State Department of Transportation. The two models are first estimated separately, correcting for endogeneity biases that may exist in the field model. Joint estimation is used next to quantify the bias in the experimental data set and estimate the parameters of the combined model. This study shows that joint estimation can lead to more robust crack-initiation models compared to those estimated separately by the two data sets.

DOI10.1061/(ASCE)IS.1943-555X.0000148