Multiplex Network Topology for Contagion Resilience in Urban Mobility Systems: Network Simulation

Abstract

The structural complexity of modern urban mobility systems presents a dual paradigm: while highly interconnected networks facilitate efficient transportation and economic vitality, they simultaneously serve as primary vectors for the rapid propagation of infectious diseases. This paper presents a comprehensive network simulation study exploring the relationship between multiplex network topology and contagion resilience within urban mobility systems. By conceptualizing the urban transit infrastructure as a multiplex network comprising distinct but interdependent layers such as subway systems, bus routes, and pedestrian pathways, we capture the heterogeneous nature of human movement. Utilizing advanced simulation frameworks, we model the spread of a hypothetical pathogen across these interconnected layers to evaluate systemic vulnerabilities and points of structural failure. The analysis reveals that the interplay between intra-layer connectivity and inter-layer coupling significantly dictates the speed and magnitude of contagion events. Furthermore, we assess various targeted intervention strategies, including node isolation and flow restriction, to determine their efficacy in enhancing structural resilience without entirely compromising mobility functionality. The findings demonstrate that multiplex network perspectives are indispensable for designing robust urban infrastructures capable of withstanding epidemiological shocks. This research contributes critical insights into urban planning, public health policy, and complex systems theory, providing a scalable methodology for evaluating urban resilience.