Development of an Algorithm of Automatically Setting Critical Speeds on Urban Expressways
Development of an Algorithm of Automatically Setting Critical Speeds on Urban Expressways
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发表时间：
2011
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通讯作者：
T. Shiraishi;H. Akahane
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作者：
T. Shiraishi;H. Akahane
本研究的目的是开发一种算法，通过使用交通检测器数据，自动设定临界速度，以便实时区分城市高速公路网络路段中拥堵和非拥堵的交通流。一种图像二值化方法被应用于结合一种边缘增强技术，在交通流量和速度的散点图上设定临界速度。该算法与现有的使用大津阈值选择方法的算法进行了比较评估。此外，该算法使用东京都高速公路网络的交通检测器数据进行了验证。
The purpose of this study was to develop an algorithm for automatically setting critical speeds that discriminate in real-time between congested and uncongested traffic flow in road sections of urban expressway networks through the use of traffic detector data. A method of binarizing images was applied to set critical speeds on scatter-grams of traffic volume and speeds in combination with a kind of edge enhancement. This algorithm was evaluated in comparison with an existing one that used the threshold selection method by Otsu. In addition, this algorithm was validated with traffic detector data of the Tokyo Metropolitan Expressway Networks.