California Partners for Advanced Transportation Technology

This report studies how flows in large scale transportation networks can be subjected to rapid estimation. It describes an efficient transportation network analysis (TNA) procedure that provides the system-wide changes of network flows under numerous scenario earthquakes. The first objective of this research is to provide reliable estimates of network flows with respect to changes in transportation networks, and to incorporate these changes to the decision-making procedures used by the California Department of Transportation (Caltrans) in making bridge retrofit decisions. The second objective is to evaluate the applicability of the TNA procedure to a large-scle transportation network. The third objective is to identify travel demand changes due to the opening or closure of network links in the aggregated Los Angeles highway network.