The communities on both sides of Vibhavadi Rangsit Road have been expanding over the years, with tall buildings, government offices, corporate offices and shops lining the road. This has served to choke the drainage system, which was not designed to handle so much discharge. Furthermore, the water management system on Vibhavadi Rangsit Road is a closed system, requiring the use of a pumping station that is under the supervision of the Bangkok Metropolitan Administration’s Department of Drainage and Sewerage. Heavy rainfall of over 100 mm. will instantly cause flooding which in turn, affects the flow of traffic.