重力
干扰
图表
万有引力
流量(计算机网络)
流量(数学)
机械
物理
经典力学
统计物理学
地质学
数学
计算机科学
统计
计算机安全
热力学
作者
Kazuhito Komada,Shuichi Masukura,Takashi Nagatani
标识
DOI:10.1016/j.physa.2009.03.029
摘要
We study the effect of gravitational force upon traffic flow on a highway with sag, uphill, and downhill. We extend the optimal velocity model to take into account the gravitational force which acts on vehicles as an external force. We study the traffic states and jamming transitions induced by the slope of highway. We derive the fundamental diagrams (flow-density diagrams) for the traffic flow on the sag, the uphill, and downhill by using the extended optimal velocity model. We clarify where and when traffic jams occur on a highway with gradients. We show the relationship between densities before and after the jam. We derive the dependence of the fundamental diagram on the slope of gradients.
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