Skip to main content

Influence of light level on the incidence of road casualties and the predicted effect of changing ‘summertime’

Buy Article:

The full text article is temporarily unavailable.

We apologise for the inconvenience. Please try again later.


Previous studies of the apparent influence of daylight level and hour changes on the incidence of road casualties are reviewed and refined, by analysis of official databases for Great Britain (1969–1973 and 1985–1994) and the USA (1991–1995). New statistical methods, based on precisely computed altitudes of the sun for each accident location, are used to model casualty frequencies aggregated by week and hour of day, and locally evaluated associations between individual casualty incidence and solar altitude. Estimates of the altitude factor are interpreted causally to give counterfactual estimates of the effect of different clock time schedules on countrywide casualty numbers.

Keywords: Hour changes; Proportional hazards; Road casualties; Solar altitude

Document Type: Research Article

Affiliations: 1: Transport Research Laboratory, Crowthorne, UK 2: University College London, UK

Publication date: 1999-02-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more