A STUDY OF SPEED BUMPS

On December 10, 1974, the City of San Jose's Public Works Department began a series of tests as to the feasibility of installing speed bumps on City streets. The scope of this study was restricted to evaluating the potential effectiveness of various types of speed bump configurations in reducing vehicle speeds, with determination of potential liability difficulties being limited to immedate vehicle damage or driver loss of control. One of the primary methods of evaluating the potential effect of speed bumps on reducing speeds was the rating of passenger discomfort and noticeability. This was based on the assumption that a well-designed speed bump should inflict increasing discomfort and noticeability in proportion to the amount the vehicle exceeded the design speed of the bump. Based on the test data, we reached the following conclusions: 1. The speed bumps tested are not effective in reducing vehicle speeds; 2. Speed bumps present an immediate and specific hazard to some vehicles, (the bicycle, the motorcycles, and the fire truck) and a potential hazard to all vehicles; 3. It is probably impossible to design an effective narrow speed bump for all types of vehicles. 4. Speed bumps would cause noise pollution in residential neighborhoods.

  • Corporate Authors:

    San Jose, City of, California

    Department of Public Works
    San Jose, CA  USA 
  • Authors:
    • Turturici, A R
  • Publication Date: 1975-4

Media Info

  • Features: Figures; Tables;
  • Pagination: 84 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00133487
  • Record Type: Publication
  • Source Agency: National Safety Council Safety Research Info Serv
  • Files: TRIS
  • Created Date: Jun 5 1976 12:00AM