The minimum sample size for reliable link travel time information

To generate reliable road traffic information such as link travel time with probe vehicle data or automatic vehicle identification (AVI) data, it is necessary to ensure the minimum sample size for the variation existing in those data sources. Beginning with the analysis of data statistical properties, this paper estimates the necessary minimum sample size with the standard deviation approach, and then the originally calculated results are summarized according to the influential factors of link travel time information's reliability to get a more general minimum sample size result. Finally, these results are validated by comparing the traffic information generated respectively from the source data and randomly selected data with the estimated minimum sample size. For the covering abstract see ITRD E140665.

• Authors:
  • YAO, E
  • FUJITA, T
  • SATOU, A
  • SUGISAKI, Y
• Publication Date: 2007

Language

• English

Media Info

• Serial:
  • PROCEEDINGS OF THE 14TH WORLD CONGRESS ON INTELLIGENT TRANSPORT SYSTEMS (ITS), HELD BEIJING, OCTOBER 2007
  • Publisher: ITS America

Subject/Index Terms

• TRT Terms: Conferences; Data collection; Driver information systems; Intelligent transportation systems; Statistical sampling; Traffic flow; Travel time
• ITRD Terms: 8525: Conference; 8623: Data acquisition; 8763: Driver information; 8735: Intelligent transport system; 697: Journey time; 6553: Sample (stat); 671: Traffic flow
• Subject Areas: Operations and Traffic Management; I71: Traffic Theory; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 01141145
• Record Type: Publication
• Source Agency: TRL
• Files: ITRD
• Created Date: Sep 30 2009 9:05AM