Accelerating Roundabout Implementation in the United States - Volume IV of VII: Review of Fatal and Severe Injury Crashes at Roundabouts
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Accelerating Roundabout Implementation in the United States - Volume IV of VII: Review of Fatal and Severe Injury Crashes at Roundabouts

Filetype[PDF-1.20 MB]


English
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  • Creators:
  • Corporate Creators:
    United States. Federal Highway Administration. Office of Safety
  • Contributors:
    Shaw, Jeffrey
  • Corporate Contributors:
    Kittelson & Associates
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FHWA-SA-15-072
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    United States
  • Contracting Officer:
    Shaw, Jeffrey
  • Corporate Publisher:
    United States. Federal Highway Administration. Office of Safety
  • Abstract:
    This volume is fourth in a series of seven. The other volumes in the series are: Volume I - Evaluation of Rectangular Rapid Flashing Beacons (RRFB) at Multilane Roundabouts, Volume II – Assessment of Roundabout Capacity Models for the Highway Capacity Manual, Volume III – Assessment of the Environmental Characteristics of Roundabouts, Volume V – Evaluation of Geometric Parameters that Affect Truck Maneuvering and Stability, Volume VI – Investigation of Crosswalk Design and Driver Behaviors, and Volume VII – Human Factor Assessment of Traffic Control Device Effectiveness. These reports document a Federal Highway Administration (FHWA) project to investigate and evaluate several important aspects of roundabout design and operation for the purpose of providing practitioners with better information, leading to more widespread and routine implementation of higher quality roundabouts. This report summarizes the review of fatal crashes at roundabouts in the United States known to the team through December 2013, along with a sample of injury crashes from the States of Washington and Wisconsin. The information summarized in this report focuses on crash characteristics and harmful events to determine whether there are elements of roundabout design practice that can be modified to reduce the likelihood of a fatality or severe injury even further. Crash types found to be overrepresented include motorcycle crashes, fixed object crashes, and crashes involving impaired driving. Attention to curb design, particularly at the interior edge of the truck apron and the splitter island; increased visibility of the intersection; and attention to the placement and protection of fixed objects have the potential to reduce fatal and severe injury crashes. Continued emphasis on driver education and enforcement is also recommended to address the large number of crashes involving impaired drivers.
  • Format:
    PDF
  • Funding:
    DTFH61-10-D-00023-T-11002
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