DETERMINING PAVEMENT SKID RESISTANCE REQUIREMENTS AT INTERSECTIONS AND BRAKING SITES

THE DETERMINATION OF SKID RESISTANCE REQUIREMENTS FOR ANY GIVEN SET OF ROADWAY AND TRAFFIC CONDITIONS IS REPORTED. THE STUDY FOCUSES ON WET PAVEMENT SKIDDING ACCIDENTS AT INTERSECTIONS AND CURVES. THE FEASIBILITY OF IMPLEMENTING THESE PROCEDURES WAS DEMONSTRATED IN THE FIELD. A SIMPLIFIED VERSION OF THE PROCEDURES WAS ALSO DEVELOPED. THE THREE STEPS INVOLVED IN THE PROCEDURE FOR DETERMINATION OF SKID RESISTANCE REQUIREMENTS ARE OUTLINED. THE SYSTEM DEVELOPED FOR MEASUREMENT OF LONGITUDINAL ACCELERATION AT INTERSECTIONS IS BASED ON THE USE OF A SERIES OF EVENT DETECTORS TO DETERMINE THE TIME-POSITION SIGNATURE OF A VEHICLE OVER SOME KNOWN DISTANCE, FROM WHICH ACCELERATION VALUES CAN BE COMPUTED. DATA WAS COLLECTED FOR AN AVERAGE OF 350 VEHICLES AT EACH OF 12 INTERSECTIONS. CONTROLLED SKID STUDIES WERE CONDUCTED TO DETERMINE THE RELATIONSHIP BETWEEN LONGITUDINAL ACCELERATION AND SKID RESISTANCE REQUIREMENTS. A SIMPLIFIED INTERSECTION DEMAND MODEL (IDM) FOR ESTIMATING SKID RESISTANCE IS DESIRED. THIS IS BASED ON THE APPARENT NORMALITY OF DISTRIBUTION OF OBSERVED DECELERATION VALUES AT THE VARIOUS DISTANCE INTERVALS FROM THE STOP LINE OF THE 12 SITES STUDIED. THE FINDINGS INDICATE A STRONG RELATIONSHIP BETWEEN PAVEMENT SKID RESISTANCE AND LOCKED WHEEL BRAKING DECLARATION. ACCELERATIONS AND SPEEDS OF VEHICLES BRAKING AT INTERSECTION ARE NORMALLY DISTRIBUTED AND EXHIBIT STABLE STANDARD DEVIATIONS. A RELATIONSHIP EXISTS BETWEEN AVERAGE APPROACH SPEED AND SKID RESISTANCE REQUIREMENTS. CONSIDERABLY MORE EXTENSIVE FIELD EVALUATIONS ARE NECESSARY TO VERIFY THE APPLICABILITY OF THE PROCEDURES.

• Record URL:
  http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rrd_50.pdf
• Supplemental Notes:
  • 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.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Publication Date: 1973-11

Media Info

• Media Type: Digital/other
• Features: Figures; Tables;
• Pagination: 12 p.
• Serial:
  • NCHRP Research Results Digest
  • Issue Number: 50
  • Publisher: Transportation Research Board

Subject/Index Terms

• TRT Terms: Acceleration (Mechanics); Braking; Curves (Geometry); Deceleration; Intersections; Mathematical models; Moisture content; Pavements; Performance; Skid resistance; Skidding; Specifications
• Uncontrolled Terms: Field performance; Models; Requirement; Wet conditions
• Old TRIS Terms: Determination
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00207605
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: May 15 1974 12:00AM