摘要
基于各国移动交通检测系统中探测车样本数量问题的研究现状,分析了现有成果存在的不足。在考虑探测车速度、计算时间间隔、数据精度要求等因素基础上,针对交通流密度均匀分布和非均匀分布两种情况,利用数理统计方法建立了道路网上探测车样本数量的双层模型。结果表明:当计算时间间隔为5 min时,若道路网上交通流密度均匀分布,则探测车比例至少为5.0%;若道路网上交通流密度非均匀分布,则探测车比例至少为7.0%。
On the basis of traffic detection system, researches on the world-wide probe vehicles sample size for mobile authors analyzed shortcomings of existing products. Aimed at the conditions of uniform and non-uniform distribution of traffic flow density, using mathematical statistics method, bi-level sample size model of probe vehicles sample size on road network was established which took into account probe vehicle speed, calculation time interval and data precision. The result shows that if calculation interval is 5 rain and traffic flow density is uniform on road network, probe vehicles proportion should be at least 5.0%. Otherwise, it should be at least 7.0%.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2007年第1期96-101,共6页
China Journal of Highway and Transport
基金
国家重点基础研究发展计划("九七三"计划)项目(2005CB724205)
国家自然科学基金重点项目(70631002)
关键词
交通工程
移动交通检测系统
数理统计方法
探测车
样本数量
traffic engineering
mobile traffic detection system
mathematical statistical method
probe vehicle
sample size
