Stochastic description of traffic flow

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift


We propose a traffic model based on microscopic stochastic dynamics. We built a Markov chain equipped with an Arrhenius interaction law. The resulting stochastic process is comprised of both spin-flip and spin-exchange dynamics which models vehicles exiting, entering and interacting in a two-dimensional lattice environment corresponding to a multi-lane highway. The process is further equipped with a novel look-ahead type, anisotropic interaction potential which allows drivers/vehicles to ascertain local fluctuations and advance to new cells forward or sideways. The resulting vehicular traffic model is simulated via kinetic Monte Carlo and examined under both, typical and extreme traffic flow scenarios. The model is shown to correctly predict both qualitative as well as quantitative traffic observables for any highway geometry. Furthermore it also captures interesting multi-scale phenomena in traffic flows after a simulated accident which lead to oscillatory, dissipating, traffic waves with different periods per lane.


Externa organisationer
  • University of North Carolina at Charlotte

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Matematik


Sidor (från-till)1083-1105
TidskriftJournal of Statistical Physics
Utgåva nummer6
StatusPublished - 2008
Peer review utfördJa
Externt publiceradJa