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:
  • Roundabouts
  • Rural highways
  • High speed vehicles
  • Speed control
  • Signs
  • Beacons
  • Road markings
  • Transition curves
  • Lighting
• 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.
  More +
• Format:
  PDF
• Funding:
  99007 WO#4
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/32632/dot_32632_DS1.pdf
• File Type:
  [PDF - 4.67 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:0a43b5e5a6d94ce461e459fe287f350f0ce64d0e5c063889fabdafaea655094bee01c075314b6bacd0ae600637787530a76c9c7f1f9f907dfd17206786501674