ACCIDENT RATES IN DAYLIGHT, DARKNESS AND TWILIGHT

This article presents the results of a comparison between accident rates during daylight, darkness, and twilight for urban and rural areas in Iceland. For the city of Reykjavik, 23,859 accidents during 1983-91 were analysed. It was found that the accident rates seem to be the same there during all three times of day, although injury accident rates were about 1.4 times as great during darkness. Defining 'day-time' as 7am to 10pm and 'night-time' as 10pm to 7am, it was found that the ratio of day-time to night-time accident rates was 1.3 for all accidents and 1.6 for injury accidents. The accident rate on urban streets was found to be much higher than on rural roads, but the risk of injury was also much lower, and urban injury accident rate exceeded rural injury accident rate only during daylight. Rural roads without lighting had similar distributions of accident rates by time of day and by time of day for four parts of Iceland. Accident analyses were also made for rural roads with some lighting, and for the road between Reykjavik and Keflavik international airport. The respective rates for all accidents and for injury accidents were: (1) 1.0 and 1.4 for urban streets in Reykjavik; (2) 1.7 and 1.4 for rural roads without lighting; (3) 2.1 and 2.4 for rural roads with lighting; and (4) 2.8 and 4.2 for the airport road.

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  • English

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Filing Info

  • Accession Number: 00729184
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Dec 12 1996 12:00AM