A study has been made of the entry capacities of offside priority roundabouts at twenty-eight public road sites. The results have been used to check and calibrate provisional formulae developed previously by means of a full-scale track experiment at TRRL. The effects of traffic composition have been assessed and passenger car units derived for heavy vehicles and two-wheelers in the entry and circulating flows. Slightly simplified versions of the track experiment equations have been developed for public road conditions; they allow the capacity of an individual entry to be predicted given the circulating flow across the entry and certain geometric parameters, notably the entry width and flare. /Author/TRRL/

  • Availability:
  • Corporate Authors:

    Transport and Road Research Laboratory (TRRL)

    Wokingham, Berkshire  United Kingdom 
  • Authors:
    • Glen, MGM
    • SUMNER, S L
    • KIMBER, R M
  • Publication Date: 1978

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 21 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00194977
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Report/Paper Numbers: Suppl. Rpt. SR436 Monograph
  • Files: ITRD, TRIS, ATRI
  • Created Date: Jul 11 1979 12:00AM