Simultaneous Estimation of Origin Destination Matrix and Parameters of Activity and Destination Choice Model
Travelers' trip making decisions are driven by their desire to conduct activities such as working, shopping and/or eating. Therefore, trip demands on road network in terms of origin destination (O D) matrices should be determined by road users' activity choices. However, in practice, collection of adequate data on travelers' activity patterns is difficult. The study presented in this paper introduces a bi level model based on road users' activity choice behavior to estimate the vehicular O D matrix from vehicular counts on selected network links. The problem addressed in the upper level is the minimization of the quantity of errors measured in vehicular counts and O D trip demands, while the lower level problem relates to the activity based stochastic user equilibrium assignment model for road networks. The numerical example revealed in this study indicates that the application of the proposed bi level model provides more qualified O D matrix estimation results.