THE USE OF THE COWAN M3 DISTRIBUTION FOR MODELLING ROUNDABOUT FLOW

This paper analyses two methods for the estimate of parameters in the M3 distribution. Both methods were derived by Sullivan DP and Troutbeck RJ (see IRRD 866429). The maximum likelihood method was found to give poor results, depending on deviance between the M3 distribution and the observed distribution. The method of moments gave good results. If the minimum headway was fixed the proportion of free vehicles could be related to the traffic flow. These results were used for the analysis of two-lane flow. The M3 distribution, generalised for the two-lane case, was found to fit well to observed data. It also gave good predictions of capacity.

• 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:
  • Hagring, O
• Publication Date: 1996-5

Language

• English

Media Info

• Features: References;
• Pagination: p. 328-32
• Serial:
  • Traffic Engineering & Control
  • Volume: 37
  • Issue Number: 5
  • Publisher: Hemming Group, Limited
  • ISSN: 0041-0683
  • Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

• TRT Terms: Headways; Highway capacity; Mathematical models; Roundabouts; Traffic flow
• ITRD Terms: 643: Capacity (road, footway); 685: Headway; 6473: Mathematical model; 438: Roundabout; 671: Traffic flow
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00724270
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, ATRI
• Created Date: Aug 19 1996 12:00AM