A Microscopic Simulation System for Traffic Flow with Uncertainty

The uncertainty of traffic flow is the essential, unavoidable and difficult problem not only for traffic flow theory but also for traffic control and traffic route guidance. In this paper, the viewpoint for uncertainty will be provided firstly, and the uncertainty is classified into two types: subjective uncertainty and objective uncertainty. The objective uncertainty is distinguished from substantive uncertainty and non-substantive uncertainty. The micro-simulation systems involve in reflecting the substantive uncertainty of traffic flow process. The mathematical framework of the treatment for traffic flow process with consideration of uncertainty is presented. The structure of a developed micro-simulation system called "Reliable Assistant of Study on ITS, RASITS" in which the substantive uncertainty of traffic flow process is considered is given.