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The explosive growth in connected vehicle infrastructures and IoT-enabled traffic systems opens the potential for novel societal impacts stemming from cyber-attacks on transportation systems. Researchers and threat actors have demonstrated that they can gain control of safety-critical vehicle functions, compromise poorly authenticated third-party apps, as well as modify supervisory control and data acquisition (SCADA) systems. This raises the question of where policy makers should invest to reduce the most significant consequences of a cyberattack on road infrastructure. In this paper, the authors develop a network-based approach in conjunction with historical trip information to quantify the network impacts of cyberattacks on road networks in Washington DC. They find that a highly targeted attack on only 10 SCADA-controlled signaling devices at specific locations disrupts a third of the most efficient paths in Washington DC. The results open the possibility of layered deterrence strategies that minimize the disruptive consequences of cyberattacks, thereby reducing benefits to attackers.

Evaluating the Strategic Consequences of Cyber Targeting Strategies on Road Transport Networks: A Case Study of Washington DC