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21.
Since ramp is an important composition of traffic system
and there often exist multi ramps in a traffic system, the number of
ramps can have great effects on main road traffic and produce some
complex phenomena. In this paper, we employ the model presented by
Tang \textit{et al}. [2009 {\em Communications in Theoretical
Physics} {\bf 51}({1}) 71] to further study the effects of the number
of on-ramps on the stability of traffic flow on a ring road. The
numerical results show that this model can reproduce some complex
traffic phenomena resulting from multi on-ramps on the ring road and
the effects of the number of on-ramps on traffic flow, but the
phenomena and the effects are both related to the initial density of
the main road. 相似文献
22.
We use the car-following model (Phys. Rev. E 72 (2005) 066124) to further analyse the two-lane traffic waves. Our numerical results show that in the two-lane traffic, there exist triangular shock, soliton wave and kink wave which appear in the stable, mestastable and unstable regions of headway-sensitivity space, respectively. Compared with the single-lane traffic, it is found that the lateral distance has little effect on the formation of triangular shock and soliton wave although the lateral distance can enlarge the stable region and can reduce the mestastable and unstable regions. 相似文献