停车让行交叉口机动车接受间隙和拒绝间隙分布特征

Distribution Characteristics of Accepted Gap and Rejected Gap for Vehicles Crossing Stop-controlled Intersections

为了给出停车让行交叉口机动车的临界间隙值,调查了上海市不同区域(中心区、郊区等)和不同类型(十字形、T形)的14个交叉口,提取各交叉口不同流向(主路左转、支路直行、支路左转)交通流之间的穿越行为特征数据。基于Raff方法和极大似然估计法,对接受间隙和拒绝间隙数据进行统计分析,从而获得了不同类型交叉口不同流向的临界间隙值,将实测值与HCM2010中的推荐值进行比较。统计分析结果表明:T形交叉口和十字形交叉口的接受间隙和拒绝间隙明显不同,其中342型交叉口各流向的接受间隙和拒绝间隙值明显大于322型交叉口各流向的接受间隙和拒绝间隙值;支路左转车流的实测值大于HCM2010的推荐值,而其他流向的实测值均小于HCM2010推荐值;不同区域的交叉口各流向临界间隙值不同,越靠近外环,机动车临界间隙越大。

In order to provide the values of critical gap for vehicles crossing stop-controlled intersection, 14 intersections of different types （cross intersection or T-intersection） in different areas （central area or suburban area） of Shanghai were observed, and characteristic parameters about crossing behaviors among different traffic flows （left turn from minor road, right turn from minor road, through traffic on minor road, and left turn from major road） were extracted. By employing Raff method and maximum likelihood estimation, the data of accepted gap and rejected gap were statistically analyzed, and the values of critical gap of different traffic flows at different types of intersection were obtained. The measured values of this study were compared with the recommended values of HCM2010. The results show that the critical gaps at T-intersection and cross intersection are significantly different, in which the critical gaps of all flows in type a42 are significantly greater than those in type 322. The measured value of left turn from minor is greater than the recommended value of the recommended values. And HCM2010, while the measured the critical gap values of each values of other flows are less flow in different areas is not than the same, that is, the closer the suburb is, the larger the critical gap is.