ACQUISITION OF INFORMATION ON EXPOSURE AND ON NON-FATAL CRASHES. VOL. 1, EXPOSURE SURVEY CONSIDERATIONS. FINAL REPORT

AN ANALYSIS OF THE CONSIDERATIONS INVOLVED IN THE DESIGN OF DRIVING-EXPOSURE SURVEYS IS PRESENTED. EXPOSURE IS DEFINED AS THE FREQUENCY OF TRAFFIC EVENTS WHICH CREATE A RISK OF ACCIDENT, MEASURED IN VEHICLE MILES OF TRAVEL. EXPOSURE DATA OBTAINED IN A SURVEY MAY BE COMBINED WITH ACCIDENT DATA TO DERIVE ACCIDENT RATES, FOR USE IN EVALUATING HIGHWAY SAFETY COUNTERMEASURES. EXPOSURE ESTIMATES FROM A RANDOM SAMPLE WERE ANALYZED, AND SIX VARIABLES WERE CHOSEN AS BEST PREDICTORS OF EXPOSURE (DRIVER SEX, DRIVER AGE, VEHICLE TYPE, MODEL YEAR, DAY/NIGHT, AND ROAD TYPE); 26 UNIQUE CLASSES OF THESE VARIABLES WERE DEFINED. SMALL AUXILIARY SURVEYS WERE PERFORMED TO TEST THE EFFECTIVENESS OF VARIOUS SURVEY METHODS. THE MAIL QUESTIONNAIRE METHOD (USING ONE-DAY TRIP RECORDS) WAS SELECTED AS THE BEST, BASED ON COST AND ACCURACY. INTERVIEW METHODS WERE ALSO CONSIDERED. FINAL RECOMMENDATIONS INCLUDE THE IMPLEMENTATION OF A NATIONAL EXPOSURE SURVEY FIELD TEST IN 1972 AT A COST OF ABOUT $250,000, AND CONTINUING OPERATIONAL SURVEYS ON AN ANNUAL BASIS. /HSL/

• Supplemental Notes:
  • Rpt No Hsri-03169-1, 131 PP, 19 REF
• Corporate Authors:

  Highway Safety Research Institute

  Huron Parkway and Baxter Road
  Ann Arbor, MI  United States  48109
• Authors:
  • Carroll, P S
  • Carlson, W L
  • Mcdale, T L
  • Smith, D W
• Publication Date: 1971-5-12

Subject/Index Terms

• TRT Terms: Age; Costs; Crash exposure; Crash rates; Days; Drivers; Driving; Gender; Highway safety; Night; Questionnaires; Vehicles
• Uncontrolled Terms: Exposure
• Subject Areas: Finance; Highways; Safety and Human Factors; Society; Vehicles and Equipment;

Filing Info

• Accession Number: 00221486
• Record Type: Publication
• Source Agency: Highway Safety Literature
• Files: TRIS
• Created Date: Dec 13 1971 12:00AM