摘要
冰雪条件下交叉口交通拥堵范围的正确估计,有助于交叉口交通控制的优化和决策。首先根据冰雪条件调查数据,分析了不同冰雪条件对饱和流率的影响,得到不同等级冰雪条件对交叉口饱和流率的折减值及其回归模型。然后基于信号交叉口车辆排队特点,将交叉口分为过饱和、不饱和以及临界饱和状态,并建立了交叉口实时车辆排队长度计算模型。最后考虑路网中各要素的相互关联和相互影响的特性,提出了冰雪条件下基于交叉口交通拥堵扩散范围估计方法。该交叉口拥堵扩散范围估计方法可作为冰雪天气条件下交叉口信号配时方案优化依据,同时对制定合理有效的交通拥挤疏导策略具有重要意义。
In order to estimate the scatter range of traffic congestion under snow and ice condition, this paper firstly studied how different extent snow and ice conditions influence saturation flow rate , by processing and analyzing collected data, it obtained the reduction values under different extent of snow and ice conditions as well as the corresponding re- gression function. Then the state of intersection is divided into supersaturated, under-saturated and critical-saturated based on the characteristics of vehicle queuing at signal intersections, it established the real-time calculation model of vehi- cle queue length. Finally this paper put forward the method of estimating the scatter range of traffic congestion under snow and ice condition on the basis of the interrelation and interaction of various elements of the road network. This method can be used to provide the basis of signal timing optimization , also meaningful for developing rational and effective strategies of traffic control.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2012年第6期63-66,共4页
Journal of Wuhan University of Technology
基金
黑龙江省青年科学基金(QC2009C25)
教育部人文社会科学研究青年基金(10YJC630391)
教育部高等学校博士学科点专项科研基金(20112302120037)
哈尔滨工业大学科研创新基金(HIT.NSRIF.2010082)
关键词
交叉口
冰雪条件
排队长度模型
饱和流率
拥堵扩散
intersections
snow and ice condition
calculation model of vehicle queue length
saturation flow rate
scatter range of traffic congestion
