Impact of Typhoon-Induced Flooding on Traffic Patterns and Vehicle Mix: A 24-Hour Analysis of Metro Manila's Gregorio Araneta Avenue

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Climate change has intensified extreme weather events, significantly affecting urban transportation systems. This study examines the impacts of typhoon-induced flooding on vehicle movement in Metro Manila, focusing on peak-hour traffic and changes in the vehicle mix. Using 24-hour footage obtained from the Metropolitan Manila Development Authority’s (MMDA) CCTV archive along Gregorio Araneta Avenue, the analysis highlights the disruptive effects of flooding on traffic behavior and road usage. Flood depths as low as 15 cm heavily disrupt traffic flow, particularly during rush hours. Typhoon conditions alone reduce traffic volumes due to cautious driving and the suspension of work and classes. Vehicles with higher ground clearance, such as SUVs and buses, demonstrate greater resilience, while two-wheeled vehicles and low-clearance sedans are significantly affected. These findings emphasize the need to incorporate behavioral responses and vehicle-specific characteristics into traffic simulation models to improve management strategies in flood-prone urban areas.