Assessment of Relative Accidents' Risk During Darkness

The paper presents a study of the relative risk of accidents on Polish roads in darkness. In recent years, about 39% of all accidents took place during insufficient conditions of roads lighting, i.e.: night, dusk and dawn, while the share of traffic, which has exposure to risk during that period, was approximately 29%. The winter season is particularly unfavorable, when due to daylight saving time (DST) changes, the period of adverse lighting conditions is extended. The paper presents methods for identification and assessment of various factors on risk changes of an accident during darkness. The analysis covers rural sections and roads passing through built-up areas excluding cities, which mostly have adequate artificial lighting. The study distinguishes between two groups of roads: a) national roads, which mainly carry traffic between major cities with a high share of through traffic, higher geometric standard and better infrastructure; and b) regional roads with less traffic, which serve local and regional traffic, and also are characterized by lower geometric parameters. An assessment of the accident risk during the darkness based on accident rates takes into account the impact of traffic changes during the day and year. Also, the results of the analyses with application of odds ratio are presented. The comparisons included the accidents which took place during the lack of natural light and during daylight. The risk of fatalities on national roads at night-time is about 4-times higher on rural roads and about 2.5-times higher on roads in built-up areas comparing to daytime.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: pp 306-314
  • Monograph Title: Proceedings of Second International Conference on Traffic and Transport Engineering (ICTTE)

Subject/Index Terms

Filing Info

  • Accession Number: 01600744
  • Record Type: Publication
  • ISBN: 9788691615321
  • Files: TRIS
  • Created Date: May 28 2016 6:07PM