ACCURACY OF ANNUAL TRAFFIC FLOW ESTIMATES FROM SHORT PERIOD COUNTS

VUOSIRAPORTTI LIIKENNEVAHINKOJEN TUTKIJALAUTAKUNTIEN TUTKIMISTA LIIKENNEVAHIGOISTA V. 1977

A single short period count is undertaken when an estimate of traffic flow is required at a specific site. This is done for ad hoc studies, such as the investigation of a highway proposal. Such a count is needed, for example, for the economic evaluation of road schemes using the department of transport's computer program coba. In this report, the efficiency and accuracy of annual flow estimates from short period counts are examined. Recommendations are given for the most appropriate length and timing of counts. These consist of values for the expansion factors used to estimate annual flow, and measures of the accuracy of these estimates.(a) (TRRL)

• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • Phillips, G
• Publication Date: 1979

Media Info

• Features: Figures; References; Tables;
• Pagination: 29 p.

Subject/Index Terms

• TRT Terms: Accuracy; Annual; Computer programs; Economic conditions; Economic impacts; Errors; Estimates; Forecasting; Highway planning; Methodology; Time; Traffic counts; Traffic flow; Travel patterns
• Old TRIS Terms: Yearly traffic pattern
• ITRD Terms: 6440: Error; 132: Forecast; 9102: Method; 5414: Time; 689: Traffic count; 671: Traffic flow; 9091: Year
• Subject Areas: Economics; Highways; Operations and Traffic Management; Planning and Forecasting; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00319211
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Report/Paper Numbers: TRRL SR514 Monograph
• Files: ITRD, TRIS, ATRI
• Created Date: Feb 6 1981 12:00AM