THE EFFECTS OF MOBILE ROADSIDE SPEEDOMETERS ON TRAFFIC SPEEDS: SANTA BARBARA, CALIFORNIA, 1990

A study was conducted to evaluate mobile roadside speedometers as a means of controlling urban traffic speeds under varied schedules of deployment and speed limit law enforcement. Speeds of cars passing the roadside speedometer were measured using nondetectable radar. The data indicate that, generally, the speedometer's presence reduced traffic speeds alongside the speedometer and for short distances downstream. The downstream reductions were smaller, and the effect of the speedometer was limited to the times when it was actually deployed. Associated police enforcement is a key factor, as the effect of the speedometer decayed over time but could be long lasting with a minimal amount of enforcement activity in the area of the speedometer.

• Corporate Authors:

  Insurance Institute for Highway Safety

  1005 North Glebe Road
  Arlington, VA  United States  22201
• Authors:
  • Casey, S M
  • LUND, A K
• Publication Date: 1991-10

Media Info

• Features: Figures; Photos; Tables;
• Pagination: 12 p.

Subject/Index Terms

• TRT Terms: Impacts; Law enforcement; Speed limits; Traffic speed
• Old TRIS Terms: Mobile roadside speedometers
• Subject Areas: Highways; Safety and Human Factors; Security and Emergencies; I83: Accidents and the Human Factor;

Filing Info

• Accession Number: 00618113
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 31 1991 12:00AM