He has been researching in the field of Civil Engineering especially urban transportation planning and urban planning. He has great interest in urban public transportation, bicycle, pedestrian and relation between planning of these transportation modes and urban planning, with substantial approach. He has actively involved in the improvement projects of urban transportation in certain areas. He has also great interest in urban transportation problems in developing countries. So he has conducted several investigations on the actual circumstances and analysis of political issues about bus and motorcycle in Asian countries. Because of these researches, he has recieved the appreciation letter for international activities from JSCE in 2006.