基于交通冲突模型的信号交叉口渠化岛设置方法

发布时间：2018-04-20 02:16

本文选题：交通规划 + 信号交叉号　；参考：《交通运输工程学报》2017年04期

【摘要】：为了优化信号交叉口渠化岛,提出了一种基于交通冲突模型的信号交叉口渠化岛设置方法;提取了昆明市20个信号交叉口交通冲突数据、交通流数据、交通控制方式数据和几何设计数据,采用贝叶斯方法,构建了贝叶斯固定参数交通冲突模型和贝叶斯随机参数交通冲突模型,分析了模型的拟合优度和显著影响因素;基于随机参数交通冲突模型,确定了期望交通冲突数计算公式;绘制了信号交叉口渠化岛设置标准曲线,给出了信号交叉口渠化岛类型选择流程。分析结果表明:随机参数交通冲突模型比固定参数交通冲突模型拟合结果更好;交通量(直行交通量和右转交通量)、渠化岛类型与右转设计要素(右转让行标志和右转半径)变量系数服从正态分布;每增加1%的直行交通量,交通冲突增加0.56%;每增加1%的右转交通量,交通冲突增加0.53%;4种类型渠化岛的设置可以使交通冲突分别降低12.75%、23.37%、16.18%、33.64%;右转让行标志可使交通冲突降低15.03%;右转半径增加1%,直右交通冲突降低1.72%。可见,基于交通冲突模型的渠化岛设置方法是可行的。
[Abstract]:In order to optimize the channelized island of signalized intersection, a traffic conflict model based on traffic conflict model is proposed, and the traffic conflict data and traffic flow data of 20 signalized intersections in Kunming are extracted. The Bayesian fixed parameter traffic conflict model and Bayesian stochastic parameter traffic conflict model are constructed by using Bayesian traffic control mode data and geometric design data. The goodness of fit and significant influencing factors of the model are analyzed. Based on the stochastic parameter traffic conflict model, the calculation formula of the expected traffic conflict number is determined, and the standard curve of the signalized intersection is drawn, and the process of selecting the type of the signalized intersection is given. The results show that the random parameter traffic conflict model is better than the fixed parameter traffic conflict model. Traffic volume (direct traffic volume and right-turn traffic volume), canalization island type and design elements of right-turn design (right transfer line sign and right-turn radius) variable coefficient from normal distribution; for each increase of 1% of direct traffic volume, For every 1% increase in right-turn traffic volume, the traffic conflict increases by 0.53 and 0.53. The setting of four types of channelized island can reduce the traffic conflict by 12.75 and 23.37 respectively; the right transfer line sign can reduce the traffic conflict by 15.03; the right-turn radius increases by 1, and the right-hand traffic conflict decreases by 1.72. Therefore, it is feasible to set up canalized islands based on traffic conflict model.
【作者单位】：东南大学交通学院;英属哥伦比亚大学土木工程系;宁波工程学院建筑与交通工程学院;
【基金】：国家自然科学基金项目(51322810,51561135003,71701046)
【分类号】：U491.23

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