A FURTHER NOTE ON UNDULATION AS A SPEED CONTROL DEVICE

Conventional speed bumps have sometimes been used as a passive means of controlling speed, but there are problems associated with them, such as damaging the suspension and front-end alignment of crossing vehicles and causing loss of control for drivers of two-wheeled vehicles under certain circumstances. The U.K. Transport and Road Research Laboratory (TRRL) developed a new speed control device known as an undulation (or speed hump) that eliminates many of the deficiencies associated with conventional speed bumps. This new design has been gaining acceptance in the United States; it has been installed in a number of cities and the results so far have been favorable. The results of a research study to evaluate the effectiveness of the undulation as a speed control device are reported. The study consisted of three parts: a speed study, an instrumented-vehicle study, and a questionnaire survey. The study results indicated that the undulation design is an effective speed control device and is more desirable and acceptable than the conventional speed bump. The study results also suggested that the level of speed control can be varied by adjusting the height of the undulation for use with various speed limits.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1986/1069/1069-003.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=A+FURTHER+NOTE+ON+UNDULATION+AS+A+SPEED+CONTROL+DEVICE&author=K.+Mak&publication_year=1986
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309040639
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Traffic Control Devices. Publication of this paper sponsored by Committee on Traffic Control Devices. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Mak, King K
• Publication Date: 1986

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 13-20
• Monograph Title: TRAFFIC CONTROL DEVICES AND RAIL-HIGHWAY CROSSINGS
• Serial:
  • Transportation Research Record
  • Issue Number: 1069
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Height; Measures of effectiveness; Speed control; Speed control humps; Speed limits
• Uncontrolled Terms: Effectiveness
• Old TRIS Terms: Undulation
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 00474262
• Record Type: Publication
• ISBN: 0-309-04063-9
• Report/Paper Numbers: HS-040 093
• Files: HSL, TRIS, TRB
• Created Date: Oct 31 1990 12:00AM