In this paper we are introducing a nanoscopic traffic simulation model, that aims to support investigations on traffic phenomena, based on driving behavior, that are difficult to model in a higher level. Steering angle and throttle position are the main parameters to model driver behavior. To gather such information, the model has an integrated driving simulator that allows driving in a simulated 3D environment. Vehicle tracking from the driving simulator is used to update the parameters of the simulation, to achieve a realistic representation. In this study, we have used the model to investigate the congestion causing sag curve phenomenon.