Solutions to Driver Errors at Multi-Lane Roundabouts

It is acknowledged that multi-lane roundabouts result in more collisions between users than single-lane roundabouts. Much of this has to do with the fact that multi-lane roundabouts handle more traffic. The safety performance of multi-lane roundabouts should therefore be compared to signalized intersections that accommodate similar traffic flows. However recent data in the United States and Canada are showing that collision frequency at multi-lane roundabouts is often higher than expected, and sometimes higher than the prior signalized intersection. This trend is worrisome given that roundabouts are often constructed as a means of increasing safety. The good news is that fatal and injury crashes are almost always reduced with roundabouts, even if property-damage-only crashes are not. The bad news is that often only total crashes are reported by a road agency or picked up on by the public. This is starting to foster the impression that multi-lane roundabouts are not all that safe. Multi-lane roundabouts have tremendous safety potential. Unlike single-lane roundabouts, which are applicable at lower-volume locations, multi-lane roundabouts can all but eliminate the high-speed angle crashes that injure and kill motorists, cyclists and pedestrians at large signalized intersections. But unless the trend toward higher-than-expected collision frequency is reduced, the future of multi-lane roundabouts may be in doubt.


  • English

Media Info

  • Media Type: Web
  • Pagination: 1 PDF file, 772 KB, 19p.
  • Monograph Title: TAC 2017: Investing in Transportation: Building Canada's Economy - - 2017 Conference and Exhibition of the Transportation Association of Canada

Subject/Index Terms

Filing Info

  • Accession Number: 01668471
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada (TAC)
  • Files: ITRD, TAC
  • Created Date: May 3 2018 3:15PM