United States Department of Transportation
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Abstract:We are living in a world of escalating risks. Globalization and spiraling infrastructure interdependencies have created complex and interlinked systems that generate many benefits but also significant risks. High-impact disruptions – whether caused by natural disasters, structural failures, or human-engineered terrorist events – are no longer rare and low-probability events. The confluence of these factors has made us increasingly vulnerable to catastrophic disruptions. A resiliency approach to designing, building, and protecting our critical infrastructures and managing their risks will enable us to address these risks at the systemic level. The concept of resiliency takes an integrated risk-based and layered approach to addressing inter-linkages among today's complex infrastructures. Such an approach would enable us to harness these growing risks by crafting solutions that leverage today's technological complexities while minimizing their risks. In the framework developed in this paper, we have defined resiliency as a cradle-to-grave process for designing, building, and operating critical infrastructure systems that are: a) robust and fault-tolerant; b) adaptive, aware, and resourceful; capable of assessing risks, monitoring and detecting emerging threats, and making smart, real-time decisions to correct for drift or reverse the course of unfolding events; c) have distributed capabilities and redundant resources that enable the system to adapt to loss of localized functionality and avoid single-point failures; and d) can respond and recover after a catastrophe to mitigate the consequences.
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