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本文在已建立的高速公路交通流宏观、动态、确定性模型的基础上，结合交通流中等密度区（１５≤Ｐ≤Ｐｃｒｉｔ辆／公里／车道）流量大、车速高且存在潜在不稳定等特点，提出了高速公路交通流中等密度区的主线可变速度控制和入口匝道局部积分反馈联合控制策略，最后利用计算机仿真对控制效果进行了验证，结果表明，采用主线可变速度控制和入口匝道联合控制策略可以消除某些阻塞。
Based on the established macroscopical, dynamic and deterministic model of expressway traffic flow, this paper combines the characteristics of traffic flow in medium-density traffic area (15≤P≤Pcrit / km / lane), high speed and potential instability , Proposed a combined control strategy of main line variable speed control and local integral feedback of inlet ramp in medium density zone of expressway traffic flow. Finally, the control effect was verified by computer simulation. The results show that the main line variable speed control and inlet ramp combination Control strategies can eliminate some of the obstruction.