MODERN ROUNDABOUT PRACTICE IN THE UNITED STATES

This synthesis presents information on current practices with respect to the planning, design, and operation of modern roundabouts in the United States. It will be of interest to state and local highway design engineers, traffic engineers, maintenance engineers, as well as officials concerned with roadway safety. It will also be useful to design and traffic engineering consultants who may be assisting communities with the implementation of roundabouts. The concept of the modern roundabout to move traffic more efficiently through unsignalized intersections has evolved from conventional traffic circles. This report of the Transportation Research Board presents a discussion of modern roundabout applications in the United States, based on a survey of state and local transportation agencies who provided information on 38 individual roundabouts. Case examples of three roundabouts, each representing a different type of roundabout, are described in detail. The synthesis presents information on the design guidelines used in the United States as well as those of other countries. Other major areas of interest with regard to roundabouts include safety issues; traffic capacities and delays; issues related to pedestrians, bicyclists, and the visually impaired; costs; and location criteria to be considered for roundabouts.

• Record URL:
  http://www.trb.org/Publications/Blurbs/153636.aspx
• 
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309061202
• Supplemental Notes:
  • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Jacquemart, G
• Publication Date: 1998

Language

• English

Media Info

• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 79 p.
• Serial:
  • NCHRP Synthesis of Highway Practice
  • Issue Number: 264
  • Publisher: Transportation Research Board
  • ISSN: 0547-5570

Subject/Index Terms

• TRT Terms: Bicycles; Case studies; Costs; Design; Guidelines; Highway capacity; Highway operations; Location; Pedestrians; Planning; Traffic; Traffic circles; Traffic delays; Traffic safety; Visually impaired persons
• Geographic Terms: Australia; France; Germany; Switzerland; United Kingdom; United States
• Subject Areas: Design; Finance; Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Planning and Forecasting; I21: Planning of Transport Infrastructure; I73: Traffic Control;

Filing Info

• Accession Number: 00751004
• Record Type: Publication
• ISBN: 0309061202
• Report/Paper Numbers: Project 20-5 FY 1996, Topic 28-09
• Files: TRIS, TRB, ATRI
• Created Date: Jul 16 1998 12:00AM