Mechanical restriction versus human overreaction triggering congested traffic states

Details Mechanical restriction versus human overreaction triggering congested traffic states Mechanical restriction versus human overreaction triggering congested traffic states

2004-04-14

arxiv.org/abs/cond-mat/0404315v1

Physics

Condensed Matter

Statistical Mechanics

5 pages, 3 figures, to appear in PRL

Scientific paper

10.1103/PhysRevLett.92.238702

A new cellular automaton (CA) traffic model is presented. The focus is on mechanical restrictions of vehicles realized by limited acceleration and deceleration capabilities. These features are incorporated into the model in order to construct the condition of collision-free movement. The strict collision-free criterion imposed by the mechanical restrictions is softened in certain traffic situations, reflecting human overreaction. It is shown that the present model reliably reproduces most empirical findings including synchronized flow, the so-called {\it pinch effect}, and the time-headway distribution of free flow. The findings suggest that many free flow phenomena can be attributed to the platoon formation of vehicles ({\it platoon effect})

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