Abstract
State of urban traffic is described as a complex system based on various essential elements in this study. Particularly, variety of travel behaviour in the state appearing with urban transport policy is described as artificial society. Artificial society model based on autonomous agents of trip maker would be created. Daily variety of travel behaviour is observed with using the multi-agent simulation in the artificial society. A concrete description of a complex aspect is tried such as the existing research of complexity system. Therefore, the possibility of analysis for state of urban traffic with describing as complex system can be summarized.