IDENTIFYING UNIQUE ACCIDENT-RATE CLASSIFICATIONS

A NATIONAL SURVEY OF DRIVING EXPOSURE CONDUCTED IN 1970 PROVIDED INDIVIDUAL ESTIMATES OF VEHICLE MILES OF TRAVEL IN THE PRECEDING 30 DAYS AS WELL AS ACCIDENT EXPERIENCE DURING THE PRECEDING THREE YEARS. THE RESPONSE DATA WERE USED TO CALCULATE ACCIDENT RATES FOR A SAMPLE OF 5720 DRIVERS. TWO METHODS WERE APPLIED TO DERIVE UNIQUE CLASSIFICATIONS OF DRIVER, VEHICLE, ROAD, AND ENVIRONMENT COMBINATIONS WITH RESPECT TO ACCIDENT RATE. ONE METHOD USED THE AUTOMATIC INTERACTION DETECTOR COMPUTER ALGORITHM; THE OTHER WAS BASED ON COMPUTING MAXIMUM DIFFERENCES IN GROUP ACCIDENT RATES OF ALL POSSIBLE SUBGROUPS WITHIN SUCCESSIVE GROUPS. DRIVER SEX WAS FOUND TO BE THE BEST PREDICTOR OF ACCIDENT RATE. A HIERARCHY OF ACCIDENT-RATE PREDICTOR CLASSIFICATIONS WAS DEVELOPED AND IS RECOMMENDED FOR USE IN EVALUATING ACCIDENT COUNTERMEASURES AND FOR GUIDING THE DESIGN OF FUTURE EXPOSURE SURVEYS.

• Corporate Authors:

  Highway Safety Research Institute

  Huron Parkway and Baxter Road
  Ann Arbor, MI  United States  48109
• Authors:
  • Carroll, P S
• Publication Date: 1972-9

Media Info

• Features: Figures; Tables;
• Pagination: p. 7-11
• Serial:
  • HIT Lab Reports
  • Volume: 3
  • Issue Number: 1
  • Publisher: University of Michigan Transportation Research Institute

Subject/Index Terms

• TRT Terms: Crash rates; Drivers; Forecasting; Gender; Human characteristics; Prevention; Safety
• Uncontrolled Terms: Driver characteristics
• Subject Areas: Highways; Safety and Human Factors; Security and Emergencies; Society;

Filing Info

• Accession Number: 00222116
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 12 1973 12:00AM