Traffic jams without bottlenecks—experimental evidence for the physical mechanism of the formation of a jam

Details Traffic jams without bottlenecks—experimental evidence for the physical mechanism of the formation of a jam Traffic jams without bottlenecks—experimental evidence for the physical mechanism of the formation of a jam

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008njph...10c3001s&link_type=abstract

New Journal of Physics, Volume 10, Issue 3, pp. 033001 (2008).

Physics

24

Scientific paper

A traffic jam on a highway is a very familiar phenomenon. From the physical viewpoint, the system of vehicular flow is a non-equilibrium system of interacting particles (vehicles). The collective effect of the many-particle system induces the instability of a free flow state caused by the enhancement of fluctuations, and the transition to a jamming state occurs spontaneously if the average vehicle density exceeds a certain critical value. Thus, a bottleneck is only a trigger and not the essential origin of a traffic jam. In this paper, we present the first experimental evidence that the emergence of a traffic jam is a collective phenomenon like 'dynamical' phase transitions and pattern formation in a non-equilibrium system. We have performed an experiment on a circuit to show the emergence of a jam with no bottleneck. In the initial condition, all the vehicles are moving, homogeneously distributed on the circular road, with the same velocity. The average density of the vehicles is prepared for the onset of the instability. Even a tiny fluctuation grows larger and then the homogeneous movement cannot be maintained. Finally, a jam cluster appears and propagates backward like a solitary wave with the same speed as that of a jam cluster on a highway.

Affiliated with

Also associated with

No associations

Rating

Traffic jams without bottlenecks—experimental evidence for the physical mechanism of the formation of a jam does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Traffic jams without bottlenecks—experimental evidence for the physical mechanism of the formation of a jam, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Traffic jams without bottlenecks—experimental evidence for the physical mechanism of the formation of a jam will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-879426