A SPEED-ACCIDENT RELATIONSHIP FOR EUROPEAN SINGLE-CARRIAGEWAY ROADS

This paper summarises the results of a recent cross-sectional study undertaken by the Transport Research Laboratory (TRL) for the MASTER project, to establish the actual effect of speed on accidents on European rural single-carriageway roads. It was found that a positive effect of speed was hidden by varying road quality. Detailed data on traffic speeds, flows, road geometry, and accidents for samples of rural road sections were supplied by research laboratories in the Netherlands, Sweden, and Portugal, and by 11 English local authorities. The distributions of the mean and standard deviation of traffic speed were examined critically, to investigate their properties and assess their relationships with flow, geometry and the general traffic environment; extreme speeds were also represented. A multiplicative accident model with a Poisson error structure was developed. The generalised linear modelling method (GLIM) was used to estimate the parameters of the associated 'regression' model, which provided six interesting hypotheses about accidents. Theory agreed well with observations, when one model was used for Portugal and another for the other countries. It was found that speed parameters, like the mean and standard deviation of speed, seem to be influenced strongly by flow, geometry, speed limit, and road quality, and by speed and violation level.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00410683
• Corporate Authors:

  PRINTERHALL LIMITED

  32 VAUXHALL BRIDGE ROAD
  LONDON,   United Kingdom  SW1V 2SS
• Authors:
  • BARUYA, A
  • FINCH, D J
  • WELLS, P A
• Publication Date: 1999-3

Language

• English

Media Info

• Features: References;
• Pagination: p. 135-7,139
• Serial:
  • Traffic Engineering & Control
  • Volume: 40
  • Issue Number: 3
  • Publisher: Hemming Group, Limited
  • ISSN: 0041-0683
  • Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

• TRT Terms: Average; Crash rates; Dispersion (Statistics); Distributions (Statistics); Highways; Mathematical models; Organizations; Regression analysis; Research projects; Rural areas; Shape; Speed; Statistical sampling; Traffic flow
• Uncontrolled Terms: Geometry (Shape)
• Geographic Terms: Europe; United Kingdom
• ITRD Terms: 1612: Accident rate; 6549: Average; 6512: Dispersion (stat); 6572: Distribution (stat); 8034: Europe; 2755: Highway; 6473: Mathematical model; 9057: Organization (association); 6588: Regression analysis; 8557: Research project; 328: Rural area; 6553: Sample (stat); 9073: Shape; 5408: Speed; 671: Traffic flow; 8119: United Kingdom
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; Research;

Filing Info

• Accession Number: 00766937
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, ATRI
• Created Date: Aug 2 1999 12:00AM