Beijing's rapidly increasing traffic congestion has led the BTRC to undertake a project to develop dynamic traffic simulation models to analyze and predict traffic congestion. MIT will assist BTRC by providing its DynaMIT and MITSIMLab software, and modify these traffic simulators to better represent the traffic behavior in Beijing. MIT will also work collaboratively with BTRC to design new data collection, develop new behavioral models, perform calibration, and apply the models to study traffic congestion in Beijing.