A survey of headlamp intensities has been made in Britain and four European countries. Meeting beam intensities causing glare and giving near-side illumination were recorded. Averaged intensities in the glare direction in Britain were nearly double those on the Continent, with intensities in France being higher than the continental average and more diverse. Comparisons with an earlier survey suggests little change in the glare situation in the United Kingdom in the past eight years. British values were closer than the continental to the relevant beam specification. Illuminating intensities around 4000 cd were recorded at all four British sites and the single French site, almost double the remaining European figures. There was no correlation between illumination and speed. A driver's ability to see during a meeting situation depends on both glare and illumination. Tentative conclusions based on the illumination values suggest that the British drivers would have seen a standard target 60 m away at the roadside in 44 per cent of meeting situations on a two-way, single carriageway road, compared with 56 per cent for the French drivers, and 21 per cent for the Belgian. Low illumination was responsible for this last low figure, not excessive glare. (Author)
Headlamp Intensities in Europe and Britain
1971
40 pages
Report
Keine Angabe
Englisch
Headlamp intensities in Europe and Britain
TIBKAT | 1971
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