Analysis of Travel Behavior Under Flooding Condition Based on Probe Data in Ubon Ratchathani City, Thailand

Recently, urban floods have frequently occurred and severely affected urban activities in developing cities. To minimize the impacts of transport from urban flooding, it is essential to implement adaptation measures in the transport field. Firstly, it is crucial to understand the impacts of travel behaviors and traffic states from urban flooding. Therefore, this study focused on the relationship between travel speed and inundation depth and evaluating adaptation measures in the transport field. The relationship between travel speed and inundation depth was analyzed based on the probe data. A traffic assignment model was developed to evaluate the raising arterial road measure as an adaptation measure in the transport field while reflecting the analysis results of relationships between travel speed and inundation depth. This found that the implementation in raising arterial road measure for the western bypass could be an effective adaptation measure by reducing Vehicle Kilometer Traveled (VKT) by 65% while decreasing the number of detoured by 5000 vehicles compared to the flooding situation without taking any adaptation measures.