Berlin 2005 – wissenschaftliches Programm

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AKSOE: Physik sozio-ökonomischer Systeme

AKSOE 5: Traffic Dynamics, Urban and Regional Systems I

AKSOE 5.1: Vortrag

Samstag, 5. März 2005, 10:30–11:00, TU P-N203

Self-Organized Adaptive Signal Control in a Fluid-Dynamic Traffic Flow Model of Urban Queuing Networks — •Dirk Helbing and Stefan Lämmer — Institute for Transport & Economics, Dresden University of Technology, D-01062 Dresden

We present a fluid-dynamic model for the simulation of urban traffic networks with street sections of different lengths and capacities. The model allows one to efficiently simulate the transitions between free and congested traffic based on an integrated Lighthill-Whitham model. On top of this, we observe non-linear dynamic patterns which are produced by the respective network topology. Synchronization is only one interesting example and implies the emergence of green waves. In this connection, we will discuss adaptive strategies of traffic light control which can considerably improve throughputs and travel times, using self-organization principles based on local interactions between vehicles and traffic lights. Similar adaptive control principles can be applied to other queueing networks such as production systems.

References:

[1] D. Helbing: A section-based queueing-theoretical traffic model for congestion and travel time analysis in networks, J. Phys. A: Math. Gen. 36, L593-L598 (2003).

[2] S. Lämmer, D. Helbing, and J.-P. Lebacque, Self-organized traffic control in urban road networks, preprint (2004).