Analyses have been carried out to assess the accident problem in fog and in darkness on the main motorways in the country (M1, M2, M4, M5, M6) over the period 1969-1971; about 80% of all accidents in the motorway network have been covered and the various lengths have been broken down to make comparison between different locations. Accidents in fog totalled 192 in the three year period, making up 4% of the total: 129 of these occurred during daylight hours. Accidents were on average more serious, with more casualties per accident, than those occurring in other weather conditions. About 45% of fog accidents and 22% of non-fog accidents occurred on about one-seventh (160 km) of the motorway network. Accidents in darkness totalled 1801 (39% of all accidents) in the same period: 1563 of these occurred on unlit motorways. Consideration of accidents on different lengths of road related to traffic volumes showed a range from 0.3 dark accidents per km per year on the more lightly trafficked sections to 2.4 dark accidents per km per year on the more heavily trafficked. In comparison, the range of accidents per km during all hours was proportionately less, being 1.1 to 4.9. The larger differences in the numbers of dark accidents per km may be partly explained by the higher proportion of traffic flow at night on the more heavily trafficked sections of motorway. (Author)
Motorway Accidents in Fog and Darkness
1973
16 pages
Report
No indication
English
Motorway accidents in fog and darkness
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