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AN ANALYSIS OF THE RELATIONSHIP BETWEEN DRIVER INJURY AND VEHICLE AGE FOR AUTOMOBILES INVOLVED IN NORTH CAROLINA ACCIDENTS DURING 1966-1970

IT HAS BEEN HYPOTHESIZED THAT THE CHRONOLOGIC AGE OF AN AUTOMOBILE (AS DISTINCT FROM ITS MODEL YEAR) IS AN IMPORTANT FACTOR WITH RESPECT TO INJURY SEVERITY RESULTING FROM MOTOR VEHICLE ACCIDENTS. TO INVESTIGATE THIS HYPOTHESIS, INJURIES TO UNBELTED DRIVERS IN ACCIDENTS IN NORTH CAROLINA DURING 1966, 1968, 1969, AND 1970 WERE EXAMINED FOR SIX OF THE MORE COMMON MAKES OF CARS WITH THE 1960 -1966 MODELS WITHIN EACH MAKE. INJURY SEVERITY FOR A GIVEN MAKE AND MODEL YEAR COMBINATION FOR ACCIDENTS IN A GIVEN YEAR IS COMPARED WITH THE AGGREGATE (I.E., ALL FOUR YEARS) FOR THE SAME MAKE AND MODEL AFTER ADJUSTING FOR ACCIDENT TYPE (I.E. CAR-OFF-ROAD), IMPACT SITE (E.G., REAR), AND TRAVELING SPEED PRIOR TO THE CRASH. THE PROCEDURE CALCULATES AN EXPECTED FREQUENCY (M) OF SERIOUS INJURIES BASED ON THE AGGREGATE AND COMPARES IT WITH THE OBSERVED FREQUENCY (N) FOR EACH ACCIDENT YEAR USING AN APPROPRIATE CHI-SQUARE TEST. THE MAIN QUESTION IS WHETHER THERE IS A TREND OVER ACCIDENT YEARS IN THE VALUES OF THE RATIOS, R=N/M, A LINEAR REGRESSION MODEL IS FIT TO THE RATIOS BY WEIGHTED LEAST SQUARES. THE RESULTS OF THIS INVESTIGATION SUGGEST THAT THE VEHICLE DETERIORATION HYPOTHESIS DOES NOT APPLY TO THESE NORTH CAROLINA ACCIDENT DATA.

  • Corporate Authors:

    University of North Carolina, Chapel Hill

    Highway Safety Research Center
    Chapel Hill, NC  United States  27599
  • Authors:
    • KOCH, G G
    • Reinfurt, D W
  • Publication Date: 1973-2

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 33 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00224303
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: HS-013 115
  • Files: HSL, TRIS, USDOT
  • Created Date: Aug 15 1983 12:00AM