Abstract In this paper, the speed gradient (SG) model is extended to describe the traffic flow on two-lane freeways. Terms related to lane change are added into the continuity equations and velocity dynamic equations. The empirically observed two-lane phenomena, such as lane usage inversion and lane change rate versus density, are reproduced by extended SG model. The local cluster effect is also investigated by numerical simulations.
Received: 15 September 2006
Revised: 27 December 2006
Accepted manuscript online:
PACS:
45.70.Vn
(Granular models of complex systems; traffic flow)
Fund: Project supported by the
National Basic Research Program of China (Grant No~2006CB705500),
the National Natural Science Foundation of China (Grant
Nos~10532060, 10404025, 70601026 and 10672160) and the CAS special funding.
Cite this article:
Tang Chang-Fu(汤昌福), Jiang Rui(姜锐), and Wu Qing-Song(吴清松) Extended speed gradient model for traffic flow on two-lane freeways 2007 Chinese Physics 16 1570
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