OPERATIONAL EFFICIENCY OF ROUNDABOUTS

The Kansas Department of Transportation became interested in roundabouts in 1998 and started designing and building roundabouts on state highways in Kansas. They sponsored three research projects to get before and after data at several Kansas roundabout locations. These studies are still ongoing at Kansas State University. Concurrently, the traffic engineer in the city of Manhattan, when confronted with a high crash rate at the intersection of two residential collector streets with two-way stop control, chose a roundabout over other options. The city co-sponsored a project with Mack Blackwell Transportation Center to compare the traffic operations of the roundabout with other options. The Insurance Institute for Highway Safety funded an additional project to get before and after data and analyze operation of roundabouts in Hartford County, Maryland, Hutchinson, Kansas, and Reno, Nevada. The paper reviews the data collection and analysis techniques and presents results of several comparisons of roundabouts to other types of traffic control that show that the roundabout is superior to almost every other type of traffic control based on the measures of effectiveness used. The authors present the results of their analysis that led them to conclude that roundabouts are the safest and most effective type of intersection traffic control available today. The paper also presents a brief review of some public opposition.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; References; Tables;
  • Pagination: 18p
  • Monograph Title: 2ND URBAN STREET SYMPOSIUM: UPTOWN, DOWNTOWN, OR SMALL TOWN: DESIGNING URBAN STREETS THAT WORK, JULY 28-30, 2003, ANAHEIM, CALIFORNIA

Subject/Index Terms

Filing Info

  • Accession Number: 00989165
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Apr 8 2005 12:00AM