摘要
分析了高架道路车流、入口匝道车流及其所构成的系统。指出复合分布是适合高架车流分布的一个理想模型，匝道上车辆插入高架车流的过程形成一个排队系统。当匝道上到达车流服从Ｐｏｓｓｉｏｎ 分布时，利用排队论建立了车流具有复合分布的高架道路的匝道入口处交通延误计算公式，并推出其具体表达式。
Car flows of the entrance of the circle road and the high-frame road and the whole system are analyzed. Compound distribution is a suitable distribution, because it forms a queuing system that a car on the entance of the circle road inserts the car flow of the high-frame road.When the distribution of the car flow on the entrance of the circle road is a Possion distribution,a calculation formula of traffic delay is set up according to the queuing theory. Furthermore the angle between the entrance of the circle road and the high-frame road is sought out. These researches furnish evidence for designing the circle road and optimization of efficiency of the high-frame road.
基金
上海市教委青年基金
关键词
高架道路
交通延误
复合分布
匝道入口
排队论
elevated road, traffic delay, critical gap, compound distribution, queuing theory
