AN ASSESSMENT OF SEASONAL AND WEATHER EFFECTS ON THE FREQUENCY OF ROAD ACCIDENTS IN CALIFORNIA

The day-to-day variations in the numbers of accidents on the state highways of California in 1970 have been studied with reference to the time of year and the weather type. The weather was found to be a major factor affecting accident numbers. The mean number per day was 353 and the overall variance 11158. The variance was reduced by over 70% when 23 wet days, Christmas eve and Christmas day were excluded. On very wet days the number of accidents was often double that of corresponding dry days. Single-vehicle accidents were affected more by wet weather than were most other types of accident studied.(a) /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00014575
• Corporate Authors:

  Pergamon Press, Incorporated

  Maxwell House, Fairview Park
  Elmsford, NY  United States  10523
• Authors:
  • Satterthwaite, S P
• Publication Date: 1976-6

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 87-96
• Serial:
  • Accident Analysis & Prevention
  • Volume: 8
  • Issue Number: 2
  • Publisher: Elsevier
  • ISSN: 0001-4575
  • Serial URL: http://www.sciencedirect.com/science/journal/00014575

Subject/Index Terms

• TRT Terms: Analysis of variance; Average; Crash rates; Dispersion (Statistics); Dryness; Moisture content; Pavements; Seasons; Single vehicle crashes; Surface course (Pavements); Weather; Wet weather
• Uncontrolled Terms: Seasonal variations; Wet conditions; Wet pavements
• Geographic Terms: United States
• ITRD Terms: 1612: Accident rate; 6549: Average; 6512: Dispersion (stat); 2527: Dryness; 2525: Season; 8122: USA; 6578: Variance analysis; 2545: Weather; 3015: Wet road
• Subject Areas: Data and Information Technology; Highways; Pavements; Safety and Human Factors; I82: Accidents and Transport Infrastructure;

Filing Info

• Accession Number: 00148047
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Apr 27 1977 12:00AM