GEOMETRIC DESIGN OF ROUNDABOUTS

This departmental standard defines three types of roundabout for application to new and improved junctions on trunk roads. They have application for use on other roads. Requirements are defined in relation to the size of roundabouts, effect of approach speed, visibility, entry width, entry deflection and the circulatory carriageway. New requirements include the following main changes: method of specifying entry deflection, the previous distinction between small and conventional roundabouts has been dropped, the use of double roundabouts is encouraged, the maximum overall size of mini-roundabouts has been increased, and the visibility requirements have been modified and extended. (TRRL)

  • Corporate Authors:

    Department for Transport, England

    Economics, Local Roads and Transport Division
    London,   England  SW1P 3EB
  • Publication Date: 1984-8

Media Info

  • Features: Figures; References;
  • Pagination: 6 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00392727
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Report/Paper Numbers: TD 16/84 Monograph
  • Files: ITRD, TRIS
  • Created Date: Apr 29 1985 12:00AM