摘要
为了研究路网形态对城市交通拥堵的影响,对方格网式和环形放射式路网的交通拥堵特征进行了定量分析。利用元胞传输模型模拟方格网式和环形放射式路网的交通流运行状态,分析了2种路网在不同交通需求下的拥堵特征。结果表明:环形放射式路网比方格网式路网更容易产生交通拥堵和拥堵闭环;当路网交通负荷增加时,后者拥堵规模的增长率高于前者;前者最大拥堵规模随交通需求先呈线性增加而后趋于平缓,后者变化趋势整体上呈现"S"形。
In order to study the impact of the morphology of road network on urban traffic congestion, this paper analyzed the characteristics of traffic congestion of square net-grid roadnetwork and ring-radial road network. With the cell transmission model （CTM） the operation states of traffic flow of two types of road networks were simulated, and the congestioncharacteristics of two types of road networks were analyzed on different traffic demands. The results show that ring radial road network is easier to cause congestion and congestion loop thansquare net-grid road network; the increase rate of the congestion scale of the latter is bigger than the former when traffic load inereases; and the largest scale of congestion of the former increasesfirstly linearly with the traffic demand and then becomes gentle but the latter presents the shape of ＂S＂.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2013年第1期163-169,190,共8页
China Journal of Highway and Transport
基金
中央高校基本科研业务费专项资金项目(HUST:2011TS093)
关键词
交通工程
路网形态
数值模拟
交通拥堵
元胞传输模型
traffic engineering
morphology of road network
numerical simulation
traffic congestion
cell transmission model
