Summary

This research proposes to develop a software tool for estimating both steady-state and time-dependent origin-destination (O-D) trip tables using the concept of path flow estimation. The path flow estimator (PFE) is a one-state network observer that estimates path flows (hence O-D flows) and path travel times from traffic counts in transportation networks. The PFE can be implemented for both off-line transportation planning applications and online traffic management applications. The goal of this proposal is to adapt the PFE that best meets Caltrans' needs and to further develop it to improve the reliability and efficiency of the O-D estimates.