The aim of this paper is to simulate the effect of traffic lights and time-varying flows distribution at junctions of urban traffic networks. We consider a macroscopic model for road networks based on conservation law, describing the motion of cars as a continuous flow. At junctions some Riemann solvers to find an unique solution to Riemann problems are introduced. In particular we propose a micro-algorithm to define a Riemann solver in the situations in which a road in some time-instant is empty and the corresponding problem can be under-determined. Then, we discuss the correct use of Riemann solvers to capture the presence of traffic lights and time-varying behavior of drivers at junctions. Simulation results for a 2×2 junction and a comparison among the effects of changing traffic lights cycles in a network are shown.
Traffic light simulation with time-varying traffic distribution at junctions
DE NICOLA, CARMINE;MANZO, Rosanna;MOCCIA, VINCENZO;TUFANO, VINCENZA
2012-01-01
Abstract
The aim of this paper is to simulate the effect of traffic lights and time-varying flows distribution at junctions of urban traffic networks. We consider a macroscopic model for road networks based on conservation law, describing the motion of cars as a continuous flow. At junctions some Riemann solvers to find an unique solution to Riemann problems are introduced. In particular we propose a micro-algorithm to define a Riemann solver in the situations in which a road in some time-instant is empty and the corresponding problem can be under-determined. Then, we discuss the correct use of Riemann solvers to capture the presence of traffic lights and time-varying behavior of drivers at junctions. Simulation results for a 2×2 junction and a comparison among the effects of changing traffic lights cycles in a network are shown.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
