摘要
城市道路的交叉口延误时间是道路通行能力的重要表征,准确地计算信号交叉口延误不仅能提高通行时间评估的精确性,也是交通优化和实时调度的重要依据.在对比分析交叉口计算模型的基础上,采用大样本的浮动车数据进行交叉口延误的计算,通过合理地界定信号交叉口的影响范围和车辆通过信号交叉口的畅行速度,结合Hama分布式平台实现浮动车数据的信号交叉口延误计算.实验结果表明:在精度方面,信号交叉口延误与实际值相比的平均拟合度在84.4%以上;在计算效率方面,以6台计算节点为例,其执行效率与单机版相比提高了9.3倍.
The delay time of the urban road intersections is an important representation of the capacity for people who drive together. The accurate calculation of the intersection delay can not only improve the accuracy of the evaluation on the transit time,but also set as the important basis for traffic optimization and real-time dispatching.Based on the comparison of intersection calculation model,a large sample of floating vehicle data was used to calculate the intersections delay. Firstly,this study carries out the definition of the influence range of the reasonable signal intersections and the computation of the unimpeded velocity through the intersection signals. The experimental result show that: In accuracy,compared with the actual value,the calculated signal intersections delay data is more than 84. 4% in the fitting degree; In computational efficiency,the executive efficiency of six computing nodes is 9. 3 times higher than that of single machine.
出处
《商丘师范学院学报》
CAS
2018年第6期53-58,共6页
Journal of Shangqiu Normal University
基金
国家自然科学基金青年基金"移动对象多维索引与联合查询方法"(41401460)
关键词
信号交叉口
延误
浮动车数据
并行计算
HAMA
signalized intersection
delay
floating car data
parallel computation
hama
