高速公路匝道的运行可靠性研究  

Operation Reliability for On-ramp Junction of Urban Freeway

作　　者：庞游洋 

机构地区：[1]张家口市公路工程试验检测中心,河北张家口075000

出　　处：《工程建设与设计》2015年第1期107-110,共4页Construction & Design for Engineering

摘　　要：对于车辆的运行,尤其当不同类型的车辆出现了交错时,交通拥堵情况总是出现在城市高速公路的入站连接区域。论文基于细胞自动理论并结合现场的调查,综合进行分析,同时对几个关键参数进行了定义,如移动长度、移动速度、移动加速度、更新的时间间隔。此外,还设置了移动加速规则、蜂窝减速规则、随机规则、车道变换规则等微观模拟规则,在此基础上建立了细胞自动微观仿真模型。利用Matlab软件建立了匝道连接处交通运行的微观仿真模型。最后,利用微观模型完成了交通运行可靠性的仿真实验。在假设不同设计车速、加速车道变化长度、车辆运行概率和换道概率等前提条件下,得到了上匝道路口入站连接区域的变化情况。结果表明,匝道入站连接处操作的可靠性是由车辆出现的概率和加速车道的长度等参数来确定的。A disorder situation of traffic operation always appears in on-ramp junction area of urban freeway, because the operation action for vehicles presents the weaving condition, especially for different vehicle types. Based on the analysis on the cellular automatic theory, and combining with on-site survey data, several key parameters were defined, namely, cellular length, cellular speed, cellular acceleration, updating time interval. In addition, cellular acceleration rule, cellular deceleration rule, random rule, lane-changing rule and other micro-simulation rules were set, and cellular automaton micro-simulation model was set up. Further-more, a micro-simulation module was developed for traffic operation actions of on-ramp junction with Maflab toolbox. Finally, a simulation experiment for traffic operation reliability was done with this micro-simulation module, and the situation of change for on-romp junction area was obtained under the conditions of different mainline design speed, acceleration lane length, vehicle generation probability and lane-changing probability. The results show that operation reliability for on-ramp junction is determined by the parameters of the probability of vehicle generation and the length of acceleration lane.

关 键 词：上匝道路口 运行的可靠性 仿真模型 

分 类 号：U412.366[交通运输工程—道路与铁道工程]