摘要
文章以通行参数为基础,构建交叉口通行能力模型,由于主要采用理想化通行参数,使得模型计算结果误差较大。因此,研究延误分析法在市政道路交叉口通行能力模型。以交通流生存函数为基础,构建交叉口通行能力分布函数,作为模型建立的基础。结合现场观测法和数学模型分析法,获取延误流量关系曲线,明确当前交叉口道路的服务通行能力。依托于延误-流量曲线,从交通组成、转向车流以及进口道宽度三方面计算交叉口通行修正系数,再结合基本服务通行能力,完成交叉口通行能力计算模型的设计。结果表明:构建模型计算结果与实际通行能力相比,误差在5%内,相比文献[3]、文献[4]模型计算误差降低了18.54%、27.35%。
Based on the traffic parameters,the intersection capacity model is constructed,and the idealized traffic parameters are mainly used,which makes the calculation results of the model have a big error.Therefore,the delay analysis method is studied in the capacity model of municipal road intersections.Based on the survival function of traffic flow,the capacity distribution function of intersections is constructed as the basis of the model.Combined with the method of on-site observation and mathematical model analysis,the relation curve of delay flow is obtained to clarify the service capacity of the current intersection.Based on the delayflow curve,the intersection traffic correction coefficient is calculated from three aspects:traffic composition,turning traffic flow and entrance road width,and then combined with the basic service capacity,the intersection capacity calculation model is designed.The results show that compared with the actual traffic capacity,the calculation error of the model is within 5%,and the calculation error of the model is reduced by 18.54%and 27.35%compared with the model of literature[3]and literature[4].
作者
杨证顺
YANG Zhengshun(Sinohydro Bureau 14 Co.,Ltd.,Kunming 650041,China)
关键词
延误分析法
交叉口
通行能力
分布函数
交通量
市政道路
delay analysis
intersection
capacity
distribution function
traffic volume
municipal road
