AN ORDINAL MULTIVARIATE ANALYSIS OF ACCIDENT RATES AS FUNCTIONS OF TRAFFIC INTENSITY AT INTERSECTIONS

This research is concerned with the statistical analysis of traffic safety histories of non-signalized intersections. The objective is to determine relationsips between traffic intensity and accident rates, and to test whether intersections of differing physical designs have higher or lower rates of accidents than predicted by traffic levels. It is assumed that only aggregate data are available: (1) counts of total accidents by type (e.g., injury versus property damage only) without details concerning th e locational position(s) of the vehicle(s) involved; and (2) aggregate traffic intensity on each intersection entry without details concerning turning volumes. The approach involves the application of non-linear multivariate methods that allow data to be treated as ordinal scales. The case study application involves four-leg and three-leg ("T") non-signalized major arterial intersections in the Netherlands. Bicycle traffic and rates of accidents involving bicycles are both included in the analyses. The results indicate that there are three groups of each of the two types of intersections based on traffic flow patterns. For each group, a different functional form was found to relate its accident rates and specific traffic flow measures. There were no significant differences among the physical design categories of the intersections that were not accounted for by differences in traffic intensities.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01935860
• Corporate Authors:

  University of California, Irvine

  Institute of Transportation Studies
  4000 Anteater Instruction and Research Building
  Irvine, CA  United States  92697
• Authors:
  • Golob, T F
  • Ruhl, B
  • MEURS, H
  • VAN WISSEN, L
• Publication Date: 1986-9

Media Info

• Features: Figures; References; Tables;
• Pagination: 38 p.
• Serial:
  • Publication of: California University, Irvine
  • Publisher: University of California, Irvine
  • ISSN: 0193-5860

Subject/Index Terms

• TRT Terms: Bicycles; Crash analysis; Crash rates; Crash types; Four leg intersections; Statistical analysis; T intersections; Traffic crashes; Traffic flow; Unsignalized intersections
• Old TRIS Terms: Four way intersections
• Subject Areas: Data and Information Technology; Highways; Safety and Human Factors; I81: Accident Statistics;

Filing Info

• Accession Number: 00464760
• Record Type: Publication
• Report/Paper Numbers: UCI-ITS-WP-86-10
• Files: TRIS
• Created Date: Dec 31 1987 12:00AM