MARRI: Towards a Multiple-Airport Region Resilience Index

Multiple airport regions (MARs) are of increasing importance, ensuring the efficiency in access to the global air transportation system. MARs, however, are vulnerable to a multitude of disruptions, ranging from natural disasters and technological failures to economic fluctuations and security threats. Traditional resilience analyses in the literature have primarily focused on assessing the robustness of individual airports or specific components of the aviation system, such as infrastructure or operational procedures. These studies often employ complex network techniques and overlook the interdependencies and cascading effects that arise within and between airports, particularly in densely interconnected regions. In our study, we address this gap by adopting a more holistic and systemic perspective. A novel, fine-grained resilience index, the Multiple-Airport Region Resilience Index (MARRI) is proposed based on two aspects: Loss In Connectivity (LIC) and Travel Time Increase (TTI) under airport outage for the population. MARRI provides the detailed insights and recommendations necessary to build more resilient air transportation systems, capable of withstanding and recovering from disruptions.