Performance model is one of the key elements in transportation infrastructure management systems. Both observed and unobserved difference among the sections (helerogeneities) should be accounted for in modeling the performance. The observed heterogeneity is addressed through explanatory variables; while the unobserved heterogeneity results from other factors not included in the explanatory variables. Most of the existing work only focuses on the observed heterogeneity. Thus, the uncertainty on performance modeling is not well captured. In this paper, the issue on performance heterogeneity is investigated. A structured econometric model with hierarchical parameter structure is established. The Maximum Simulated Likelihood approach is applied to estimate the model. It is found through statistical analysis and test that unobserved heterogeneity is significant. In addition to the population parameter estimates, the individual-specific parameter estimates are also obtained, which are helpful in revealing the deterioration behavior of individual sections.
Incorporating Unobserved Heterogeneity in Pavement Deterioration Modeling
Ninth International Conference on Applications of Advanced Technology in Transportation (AATT) ; 2006 ; Chicago, Illinois, United States
2006-08-04
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Incorporating Unobserved Heterogeneity in Pavement Deterioration Modeling
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