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<p>We develop a modeling tool to represent freight container flows and the potential changes in cost of those flows  inflicted on the U.S. commercial transportation system by a Transportation Security Incident (TSI). Our model  includes available data on container movements, origin-destination (O-D) matrices for international container flows  entering or leaving the U.S., and development of an attacker-defender model to determine best contingency plans after  a TSI. We design a multi-commodity network flow model, representing flows between foreign countries and North  American ports, the modal volumes into and out of each port, and volumes between each port and the 84 U.S.  Transportation Analysis Zones. Each O-D flow is a commodity with a specified origin and destination. Subject to  constraints on total flow volume over the arcs, these commodities flow through the network at minimum cost. The  model finds paths through the network for containers to minimize their total transportation costs, and identifies a set  of the most-critical infrastructure components of the commercial container transportation system that could be  affected by a transportation security incident. This tool can help decision makers identify critical components to  improve security and capacity on existing commercial transportation infrastructure in an environment with limited available funding.
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<br>Subjects: Transportation; Planning; Containerization</div>
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Bencomo, Luis A.</div>
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