AN ANALYSIS OF THE HEADWAY DISTRIBUTION OF AN URBAN BUS SERVICE

This paper deals with a quantitative evaluation of headway distribution. The analysis utilises numerical integration and statistical techniques on headway data collected for various bus routes in Evanston, Illinois, a Chicago suburb. An earlier analysis of this study concluded that the bus travel times can best be represented by a beta distribution, the parameters of which can be predicted separately - based on system characteristics - for the peak and off-peak periods. This present study accepts the beta distribution hypothesis and suggests a model to predict bus headway behaviour. The parameters r and t of that model may be derived in terms of the length of the bus route under study. The theoretical model is examined and tested against actual headway data. It is concluded that the derived distribution, with the predicted parameters, may be a valid model for the description of actual headway behaviour.(a) (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00410683
• Corporate Authors:

  Printerhall Limited

  29 Newmart Street
  London W1P 3PE,   England 
• Authors:
  • Polus, A
• Publication Date: 1979-8-9

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 419-421
• Serial:
  • Traffic Engineering & Control
  • Volume: 20
  • Issue Number: 8/9
  • Publisher: Hemming Group, Limited
  • ISSN: 0041-0683
  • Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

• TRT Terms: Bus transit; Buses; Distributions (Statistics); Economic efficiency; Forecasting; Headways; Mathematical models; Off peak periods; Peak hour traffic; Physical distribution; Public transit; Statistical analysis; Traffic; Travel time; Urban areas
• Uncontrolled Terms: Efficiency
• Old TRIS Terms: Bus transportation (Intracity); Off-peak traffic
• ITRD Terms: 6572: Distribution (stat); 5911: Efficiency; 132: Forecast; 685: Headway; 6473: Mathematical model; 744: Public transport; 313: Urban area
• Subject Areas: Data and Information Technology; Economics; Freight Transportation; Highways; Operations and Traffic Management; Planning and Forecasting; Public Transportation; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00310365
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jun 26 1981 12:00AM