Abstract
Recently, thecompact city has been espoused as a concept for sustainability.Although higher density development increases the effectiveness of public transport, a densely built city may cause the hard road congestion, which induces more energy consumption for urban travel. This paper focuses on the environmental impact caused by compactness in terms of the interrelation between Floor Area Ratio (FAR) and traffic flow. Asincreasing FAR in city center give rise to road congestion as well as promotion of transit, there would be some different ways in auto dependent city and transit-oriented city. Especially, where density of the city is categorized in 20-50persons perhectare, traffic strategies should be fully considered to realize the compact city.
