摘要
目前路网分析与行程时间计算的误差很大程度受路段和交叉口划分位置的影响。通过分析车流在交叉口的受阻交通过程,提出了基于浮动车数据的密度法和减速点法对平面交叉口范围进行动态划分的方法,并利用南京市浮动车数据对其进行了实证和延误对比分析,结果表明这2种方法能反应交叉口交通流的时变规律,准确地对交叉口范围进行动态划分,相对于交叉口静态范围划分,在交叉口延误计算等方面具有弹性优势。
Hitherto, researches on intersection delay estimation have revealed that deviations mainly originate from the exactitude of the position that separates the intersection from segments. By analyzing the delay process of the traffic flow in the intersection, the floating car method and the deceleration point method are proposed by utilizing data near the intersection. The analysis of real-time data from the City of Nanjing demonstrated that the proposed methods can effec- tively reflect the time-dependent law of traffic flow changes at the intersection and they have a high accuracy of dynamically circumscribing the area of the intersection, Compared with the intersection＇s static subsection, the proposed methods are more flexible and have certain advantages for estimating intersection delay and traffic conditions as well as calculating travel time.
出处
《交通信息与安全》
2009年第5期38-43,共6页
Journal of Transport Information and Safety
基金
中国博士后科学基金项目(批准号:20080430688)资助
关键词
交通信息
浮动车数据
平面交叉口
交叉口延误
动态划分
traffic information
floating car data
grade intersection
intersection delay
dynamic subsections
