基于跟驰模型的隧道群交通流仿真与分析  

SIMULATION AND ANALYSIS OF TRAFFIC FLOW IN TUNNEL GROUP BASED ON CAR'S FOLLOWING MODEL

作　　者：许世燕[1] 陈玉梅 赵忠杰[1] 

机构地区：[1]长安大学电子与控制工程学院,陕西西安710064 [2]河南高速公路发展有限责任公司,河南郑州450052

出　　处：《计算机应用与软件》2016年第12期214-215,229,共3页Computer Applications and Software

基　　金：国家自然科学基金项目(51308057);中央高校基本科研业务费专项资金项目(CHD2011JC121)

摘　　要：针对高速公路隧道群的特殊交通环境,通过分析车辆在隧道群路段的行驶特征,提出基于隧道群的广义力跟驰模型。根据两座隧道间的间距长度不同,分别给出了车辆速度变化、车队的平均车速,以及车队的时空分布图。从微观和宏观两方面分析了交通流的变化过程。研究结果表明,头车较大的减速会造成后随车辆的速度振荡,但该振荡会沿着与速度相反的方向逐渐减弱;隧道入口处和出口处的平均速度均较低;上游隧道入口处及其过渡段会形成较长的拥挤路段,且隧道群比连续隧道对于道路通行能力的影响更大。Aiming at the special traffic environment in expressway tunnel group, we proposed a tunnel group-based generalised force car＇s following model through analysing driving characteristics of vehicles on road sections of tunnel group. According to difference lengths of space between two tunnels, we provided separately the velocity change of vehicles, the average velocity of ear team and its spatiotemporal distribution graph. We also analysed the traffic flow evolution process from two aspects of microscopic and macroscopic views. Research results showed that a large deceleration of the first ear will lead to velocity oscillation of following vehicles. But the oscillation trails off along the direction opposite to velocity. The average velocity on tunnel entrance and exit is low. A long crowded section will be formed on entrance of upper tunnel and its transition section, but the tunnel group effects on traffic capacity more greatly than continuous tunnel.

关 键 词：交通工程 交通流仿真 跟驰模型 高速公路隧道群 隧道间距 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论]