原文传递
Statistical Characteristics of Sample Size of Cellular Handoff Probe System for Freeway Traffic Speed Estimation
| 题名： | Statistical Characteristics of Sample Size of Cellular Handoff Probe System for Freeway Traffic Speed Estimation |
| 正文语种： | 中文 |
| 作者： | He Shang-lu Cheng Yang Zhong Gang Zhang Jian Ran in |
| 作者单位： | Jiangsu Key Laboratory of Urban ITS,Southeast University,Nanjing Jiangsu 210096, hina;Jiangsu Province ollaborative Innovation enter of Modem Urban Traffic Technologies,Southeast University,Nanjing Jiangsu 210096, hina;Research enter for Internet of Mobility,Southeast University,Nanjing Jiangsu 210096, hina; ollaborative Innovation enter for Technology and pplication of Internet of Things,School of Transportation,Southeast University,Nanjing Jiangsu 210096, hina epartment of ivil & Environmental Engineering,University of Wisconsin-Madison,Madison Wisconsin 53706,US |
| 关键词： | ITS cellular handoff probe system sample size integration time interval handoff link length relative error |
| 摘要： | Based on cellular handoff probe technology, this paper conducts a statistical analysis to find out characteristics of samples for freeway traffic state estimation.Data are collected from a segment of major freeway corridor in Jiangsu, China.First, measurements from cellular handoff probe system and microwave sensors which are regarded as the "ground truth" are transformed to uniform space-mean speeds.Second, temporal and spatial characteristics are summarized and it indicated that samples integrated by 15 minutes could produce better temporal and spatial coverage comparatively.Then correlation analysis between sample size and relative error is following up.Apparently, large sample size could achieve stable and high system accuracy.Finally, three variables including length of handoff link, traffic volume, traffic speed, which might have an influence on sample size are evaluated.Generally, shorter handoff link, high traffic volume and free-flow traffic speed are helpful to produce more samples. |
| 会议日期： | 20150427 |
| 会议举办地点： | 南京 |
| 会议名称： | 2015年南京第十四届亚太智能交通论坛 |
| 出版日期： | 2015-04-27 |
| 母体文献： | 2015年南京第十四届亚太智能交通论坛论文集 |
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