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Study on Traffic Flow at On-ramp Junctions in Urban Freeway with Cellular Automaton Model

机译：基于元胞自动机模型的城市高速公路匝道交界处交通流研究

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Numerical simulation was applied to study on-ramp junctions area traffic flow characteristics using one-dimensional cellular automaton (CA) model,which based on analyzing the traffic flow action characteristics. In course of study, we constructed some reasonable lane-changing rules to analyze the special traffic flow characteristics, affected by parameters of traffic volume and inflow rate, which based on setting up.The results showed that there was a slight disturbance with the inflow to mainline flow at the moment of little probability of the inflow. However, with the inflow probability increasing, the mainline flow would be suffered from a serious disturbance. Especially, traffic jam could be produced when the mainline and on-ramp volumes increasing to a certain level. But for the outflow,the cases are completely different, mainline exit section will be at the phase of saturation when the inflow probability exceeding 0.5. The results can provide some references for managing the on-ramp junction trafficsystem.
机译：基于一维元胞自动机（CA）模型，通过数值模拟研究了匝道交界处的交通流特征，并在此基础上对交通流的行为特征进行了分析。在研究过程中，我们建立了一些合理的变道规则，以分析受设置的流量和流量率参数影响的特殊交通流量特征，结果表明，对流量的影响很小。主线流量出现的可能性很小。但是，随着流入概率的增加，干线流量将受到严重的干扰。特别是，当干线和匝道流量增加到一定水平时，可能会造成交通阻塞。但是对于流出情况则完全不同，当流入概率超过0.5时，干线出口段将处于饱和阶段。研究结果可为管理匝道交通系统提供参考。

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