Studying accessibility, including the resilience of city transportation networks, is critical to understand how these networks influence individuals’ mobility and lives. This study developed an analytical research framework to examine the resilience of accessibility to emergency and lifesaving facilities under the threats of natural hazards such as earthquakes and wildfires. With a cumulative-opportunity approach, the authors measured accessibility by counting emergency and lifesaving facilities (including parks, schools, hospitals, roads, and fire stations) that can be reached by driving at the census tract level in San Fernando Valley, CA. With the calculated accessibility, the authors run simulations to collect data showing what would happen if an area were affected by a selected disaster. They then used statistical analysis to identify those areas where accessibility is significantly reduced compared to the original status. A normalized difference accessibility index (NDAI) was further created to suggest plans and strategies to help those vulnerable areas through adding facilities/services or improving transportation infrastructure.
Digital Object Identifier
Mineta Transportation Institute URL
Natural hazards, Accessibility, Resilience, Hotspot analysis, Statistical comparison
Infrastructure | Transportation | Transportation Engineering
Chih-Hao Wang and Na Chen. "Investigating the Resilience of Accessibility to Emergency and Lifesaving Facilities under Natural Hazards" Mineta Transportation Institute Publications (2022). https://doi.org/10.31979/mti.2022.2126