01628901

Component

This paper presents a dynamic network loading model that captures the traffic dynamics for large scale multiple reservoir network, accounts for the relationship of macroscopic traffic characteristics, and proposes a numerical scheme for reducing computational burden. It is a full-fledged model that consists of a link model and node model. First of all, the traffic dynamics of internal path segments in a reservoir are specified by a system of Lighthill-Whitham-Richards-like partial differential equation that builds on the conservation law. On the other hand, the flows at intersections are determined by the supply and demand of upwind and downwind reservoirs. Secondly, a novel numerical method based on the Godunov scheme is developed to track the movement of vehicles in network and thereby it can maintain the priority of vehicles. In comparison with previous studies, this computational efficient numerical scheme considers the non-uniformity of cell size in different path segments of a reservoir, maintains the flow conservation by a holding principle and tracks the evolution of traffic dynamics at a faster speed. Numerical experiments show that the proposed methodology could describe the dynamics of vehicles in large-scale traffic network well.

This paper was sponsored by TRB committee AHB45 Standing Committee on Traffic Flow Theory and Characteristics.

01618707

17-06533

English

23p

2017

Transportation Research Board 96th Annual Meeting

Digital/other

Figures; References; Tables

Differential equations; Intersections; Macroscopic traffic flow; Networks; Traffic models; Vehicle dynamics

Highways; Planning and Forecasting

Transportation Research Board Annual Meeting 2017 Paper #17-06533

TRIS, TRB, ATRI

Dec 8 2016 12:40PM