论文部分内容阅读
为了得到城市整体交通状况,研究了宏观交通流基本图.试图探索上海快速路网的宏观交通流基本图(MFD)的存在性和不同天的MFD图像特征.通过分析上海快速路网2周的数据,宏观交通流基本图确实存在.并且大部分天的MFD图像存在磁滞现象,在不同的交通状况下呈现不同的磁滞圈.验证了磁滞现象和交通状况的不均匀程度的关系.比较了2009年和2012年间MFD的变化,2012年MFD磁滞现象依然存在.最后,验证了磁滞圈的长度和交通拥堵的相关性,而磁滞圈的宽度即流量下降的程度与拥堵状况没有关系,它会随着不同天不同的交通状况产生变化.
In order to get the overall traffic status of the city, the macro traffic flow basic graph is studied, in order to explore the existence of the macroscopic traffic flow basic graph (MFD) and the MFD image characteristics of different days in Shanghai expressway network.Through the analysis of Shanghai Expressway network for two weeks The data and macroscopic traffic flow map do exist, and most of the days have hysteresis in the MFD images and different hysteresis loops under different traffic conditions, which verifies the relationship between the hysteresis and the non-uniform traffic conditions. The changes of MFD between 2009 and 2012 are compared and the MFD hysteresis still exists in 2012. Finally, the correlation between hysteresis loop length and traffic congestion is verified, and the hysteresis loop width, ie the degree of traffic drop and the congestion status It does not matter, it changes with different traffic conditions on different days.