CAUSAL ANALYSIS OF ACCIDENT INVOLVEMENTS FOR THE NATION'S LARGE TRUCKS AND COMBINATION VEHICLES

The chance of accident involvements of the Interstate Commerce Commission-authorized, large, single-unit trucks and tractor-trailers was investigated using the 1977 Bureau of Motor Carrier Safety accident and the Highway Cost Allocation Study exposure data. The model used was discrete-multivariate and capable of simultaneously analyzing both the accidents and the exposure. The variables that were found to be important predictors of accident involvements include trailer style, vehicle configuration, number of axles of power unit, trip length, road class, road surface condition, loading status, day/night, driver experience, and driver age. Particularly high accident involvement rates, of 200 involvements per 10 to the 8th power mi or higher, were shown by all van singles in local service, 3-axle-tractor singles in local service, 2-axle straight trucks in local service, and flatbed doubles in over-the-road service. Low accident involvement rates, less than 50 involvements per 10 to the 8th power mi, were shown by all 3-axle straight trucks and 2-axle straight trucks in over-the-road service. Van singles and tanker singles in over-the-road service showed moderate involvement rates (less than 100 involvements per 10 to the 8th power mi), while 2-axle-tractor van doubles and 2-axle-tractor tanker doubles showed higher rates (120 to 200 involvements per 10 to the 8th power mi).

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1985/1047/1047-009.pdf
• Summary URL:
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Motor Vehicle Technology. 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
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• Authors:
  • Chira-Chavala, T
  • Cleveland, Donald E
• Publication Date: 1985

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 56-64
• Monograph Title: TRAFFIC ACCIDENT DATA, DRIVER PERFORMANCE, AND MOTOR VEHICLE UPDATE
• Serial:
  • Transportation Research Record
  • Issue Number: 1047
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Age; Axle load force; Classification; Crash analysis; Crash causes; Crash rates; Drivers; Evaluation; Heavy vehicles; Highways; Multivariate analysis; Pavements; Tractor trailer combinations; Traffic crashes; Trip length; Vehicle classification
• Uncontrolled Terms: Driver age; Highway classification; Pavement conditions
• Subject Areas: Data and Information Technology; Highways; Motor Carriers; Pavements; Safety and Human Factors; I82: Accidents and Transport Infrastructure;

Filing Info

• Accession Number: 00458199
• Record Type: Publication
• ISBN: 030903963-0
• Report/Paper Numbers: HS-040 027
• Files: HSL, TRIS, TRB
• Created Date: Sep 30 1990 12:00AM