Berlin 2005 – wissenschaftliches Programm

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AKSOE: Physik sozio-ökonomischer Systeme

AKSOE 6: Traffic Dynamics, Urban and Regional Systems II

AKSOE 6.1: Vortrag

Samstag, 5. März 2005, 14:00–14:30, TU P-N203

Spontaneous formation and decay of platoons in continuous microscopic traffic models — •Martin Treiber, Arne Kesting und Dirk Helbing — Institute for Transport & Economics, Dresden University of Technology

We investigate adaptations of the time gap of car-following models as a function of the smoothness of traffic flow measured by the local velocity variance. We simulate open systems with an on-ramp as bottleneck and analyze one-minute data and single-vehicle data generated by several ”virtual detectors”.

Both the widely scattered and hysteretic fundamental diagram and microscopic results such as the distributions of the netto time headways derived from these “virtual” data indicate that spontaneous formation and decays of platoons take place. Moreover, there is a nearly quantitative agreement with actual traffic data.

We explain these results by a self-organized process driven by the adaptations of the time headway that leads to spontaneous emergences and decays of platoons even for deterministic dynamics of identical vehicles on a single lane.