Multimodal MFD models: General Formulations and Information Propagation

Abstract

Traffic state prediction models based on 3D or bi-modal Macroscopic Fundamental Diagram (MFD) is discussed in this work. The well known MFD-based models namely, accumulationbased and trip-based models are extended to the case of multimodal traffic. In addition, accumulation-based with outflow delay, which is studied in the context of link level traffic flow dynamics is investigated. The results from MFD-based models is verified with the solution of continuum space-time model, which is based on hyperbolic conservation equations. It is concluded that accumulation-based model with outflow delay address the limitations of conventional accumulation-based model and trip-based solution is most accurate among all the considered MFD-based models.