A state space model (SSM), based on spatial and temporal Bayesian conditional independencies between traffic variables, is developed to correct/update directly measured route travel times using point-based traffic flow data. In this model, lag-free current route travel time estimates can be obtained by adjusting the lagged travel time measurements in accordance with the traffic flow measurements taken during the interval between the times the observed vehicles pass the upstream and downstream license plate readers (LPRs). The model has advantages of heightened confidence, improved accuracy, and enhanced robustness over models relying on either section-based or point-based data alone.
Integration of Section- and Point-Based Data for Online Arterial Route Travel Time Estimation
Eighth International Conference on Applications of Advanced Technologies in Transportation Engineering (AATTE) ; 2004 ; Beijing, China
2004-05-13
Conference paper
Electronic Resource
English
Integration of Section- and Point-Based Data for Online Arterial Route Travel Time Estimation
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