中国物理B ›› 2010, Vol. 19 ›› Issue (11): 110503-110507.doi: 10.1088/1674-1056/19/11/110503

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Nonlinear analysis of traffic jams in an anisotropic continuum model

Arvind Kumar Gupta1, Sapna Sharma2   

  1. (1)Department of Mathematics, IIT Ropar-140001, India; (2)Mathematics Group, Birla Institute of Technology and Science, Pilani-333031, India
  • 收稿日期:2009-11-04 修回日期:2010-05-18 出版日期:2010-11-15 发布日期:2010-11-15

Nonlinear analysis of traffic jams in an anisotropic continuum model

Arvind Kumar Guptaa)† and Sapna Sharmab)   

  1. a Department of Mathematics, IIT Ropar-140001, India; b Mathematics Group, Birla Institute of Technology and Science, Pilani-333031, India
  • Received:2009-11-04 Revised:2010-05-18 Online:2010-11-15 Published:2010-11-15

摘要: This paper presents our study of the nonlinear stability of a new anisotropic continuum traffic flow model in which the dimensionless parameter or anisotropic factor controls the non-isotropic character and diffusive influence. In order to establish traffic flow stability criterion or to know the critical parameters that lead, on one hand, to a stable response to perturbations or disturbances or, on the other hand, to an unstable response and therefore to a possible congestion, a nonlinear stability criterion is derived by using a wavefront expansion technique. The stability criterion is illustrated by numerical results using the finite difference method for two different values of anisotropic parameter. It is also been observed that the newly derived stability results are consistent with previously reported results obtained using approximate linearisation methods. Moreover, the stability criterion derived in this paper can provide more refined information from the perspective of the capability to reproduce nonlinear traffic flow behaviors observed in real traffic than previously established methodologies.

Abstract: This paper presents our study of the nonlinear stability of a new anisotropic continuum traffic flow model in which the dimensionless parameter or anisotropic factor controls the non-isotropic character and diffusive influence. In order to establish traffic flow stability criterion or to know the critical parameters that lead, on one hand, to a stable response to perturbations or disturbances or, on the other hand, to an unstable response and therefore to a possible congestion, a nonlinear stability criterion is derived by using a wavefront expansion technique. The stability criterion is illustrated by numerical results using the finite difference method for two different values of anisotropic parameter. It is also been observed that the newly derived stability results are consistent with previously reported results obtained using approximate linearisation methods. Moreover, the stability criterion derived in this paper can provide more refined information from the perspective of the capability to reproduce nonlinear traffic flow behaviors observed in real traffic than previously established methodologies.

Key words: traffic flow, non-linear stability, wavefront method

中图分类号:  (Functional analysis)

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