When integrated into the transportation system infrastructure, and in vehicles themselves, Intelligent Transportation Systems, or ITS, help monitor and manage traffic flow, reduce congestion, provide alternate routes to travelers, enhance productivity, and save lives, time, and money. Here is the first comprehensive treatment of techniques to leverage ITS in support of security and safety for surface transportation infrastructure. Case studies of current ITS approaches to security issues such as freight security, disaster and evacuation response, HAZMAT incidents, rail security, and ITS Wide Area Alerts show the reader how to design, model, and implement a variety of projects.