Heterogeneous perimeter flow distributions and MFD-based traffic simulation

Guilhem Mariotte (1) , Ludovic Leclercq (1)

1 LICIT UMR TE - Laboratoire d'Ingénierie Circulation Transport

This paper investigates how network and traffic heterogeneities influence the accuracy of a simulation based on the Macroscopic Fundamental Diagram (MFD). To this end, the MFD modeling of a simple grid network is compared to the outputs of a mesoscopic kinematic wave model simulating traffic in the same network. Heterogeneous distributions of demand and supply at the boundaries are set to the local entries and exits of the mesoscopic model to generate heterogeneous network loadings. These boundary conditions challenge the MFD simulation, as significant discrepancies are observed between both modeling approaches in steady state. While the accurate calibration of the MFD and the average trip length can reduce the discrepancies for heterogeneous demand settings, no simple solution exists for heterogeneous supply settings, because they may drive very different internal congestion patterns in the network. We propose a correction method to adjust the MFD model outputs in such a case.

Mots clés: MACROSCOPIC FUNDAMENTAL DIAGRAM; HETEROGENEOUS NETWORK LOADING; RESERVOIR PERIMETER; AVERAGE TRIP LENGTH; URBAN NETWORK SIMULATION

Mots clés: MODELE MACROSCOPIQUE; VOLUME DE TRAFIC; CIRCULATION ROUTIERE; DUREE DU TRAJET; SIMULATION; RESEAU URBAIN; MODELISATION; TRAFIC ROUTIER; CINEMATIQUE; MODELE MESOSCOPIQUE; CONGESTION DU TRAFIC

Domaines: Modélisation et simulation

Guilhem Mariotte, Ludovic Leclercq. Heterogeneous perimeter flow distributions and MFD-based traffic simulation. Transportmetrica B: Transport Dynamics, 2019, 29p. ⟨10.1080/21680566.2019.1627954⟩. ⟨hal-02160465⟩