Prediction of Asphalt Pavement International Roughness Index (IRI) by Combined Approach of Empirical Regression and Markov

The most commonly used approach to predict pavement performance is Regression equation based on field data. But there is large gap between the predicted and actual values. Markov approach can be used to predict this gap, and make regression values closer to the measured. Base on the field IRI dates obtained from test sections TXLF210016 locate at 281# highway in US from 1997-2005,this paper use combine approach by empirical regression and Markov to predict the IRI data from 2005 to 2011.The principal and prediction process was describe in detail. Prediction results is very good, so as to provide a new approach for prediction of similar pavement performance.