Strategies for effective roundabout approach speed reduction : final report.

Details

• Creators:
  Brewer, Marcus A. ; Lindheimer, Tomas E. ; Chrysler, Susan T.
• Corporate Creators:
  Texas A&M Transportation Institute
• Corporate Contributors:
  Minnesota Local Road Research Board ; Minnesota. Dept. of Transportation. Research Services & Library
• Subject/TRT Terms:
  Beacons High Speed Vehicles Lighting Road Markings Roundabouts Rural Highways Signs Speed Control Transition Curves
• Publication/ Report Number:
  MN/RC 2017-14
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final report
• Corporate Publisher:
  Minnesota. Dept. of Transportation. Research Services & Library
• Abstract:
  Appropriate deceleration on approaches to roundabouts is primarily accomplished through the use of applicable
  
  geometric design principles; however, traffic control devices (specifically signing and markings on the approach)
  
  also serve a vital role in communicating to the approaching driver what speed profile should be anticipated. This
  
  report provides a resource for engineers to identify and select appropriate speed-reduction treatments for highspeed
  
  approaches to roundabouts. The research examines best practices and research literature on speedreduction
  
  techniques for high-speed approaches for all intersection types, as well as treatments for work zones
  
  and horizontal curves. Based on the findings from these efforts, the report summarizes a selection of treatments
  
  including traditional signs with and without beacons, pavement markings, illumination, speed-activated signs, and
  
  transition zones. Information on the effectiveness of these treatments, as well as potential costs of installation
  
  and maintenance, is provided for the practitioner to determine which treatment(s) best suit the site under
  
  consideration. Guidance is also provided for the methodology of conducting a speed study to determine the
  
  speed characteristics of a site, as well as links to resources for additional information. The project identifies a
  
  number of research needs specific to particular treatments as well as the general need for field research of the
  
  recommended countermeasures specifically on approaches to high-speed rural roundabouts.
  
  
• Format:
  PDF
• Funding:
  99007 WO#4
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:0a43b5e5a6d94ce461e459fe287f350f0ce64d0e5c063889fabdafaea655094bee01c075314b6bacd0ae600637787530a76c9c7f1f9f907dfd17206786501674
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/32632/dot_32632_DS1.pdf
• File Type:
  [PDF - 4.67 MB ]