How the on-ramp inflow causes bottleneck

Ding-wei Huang

Physica A: Statistical Mechanics and its Applications, 2009, vol. 388, issue 1, 63-70

Abstract: We study traffic dynamics in a simple system with three open boundaries. Traffic patterns in steady states are mainly controlled by boundary conditions. There are three distinct phases in the entire parameter space. We construct a phase diagram and develop a mean-field theory to derive the phase regimes. The influences of speed limit are also discussed. We identify three kinds of on-ramp bottleneck: localized bottleneck in free flow, severe bottleneck in congestion, and extended bottleneck in rush hours. The first two are steady and the third is dynamical. The on-ramp bottleneck can be enhanced significantly by the dynamical effects of rush hours.

Keywords: Traffic flow; Congestion; Ramp effect; Phase diagram (search for similar items in EconPapers)
Date: 2009
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:388:y:2009:i:1:p:63-70

DOI: 10.1016/j.physa.2008.09.027

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