Abstract
The question addressed in this report is whether the subjective appraisal of discomfort glare caused by highway lighting can be reasonably predicted from a photometrically based formula. The photometric measurements required for the Adrian-Schreuder glare control mark formula were made on four Toronto installations. Then observers were driven along these roads and asked to complete a questionnaire assessing their opinion of the highway lighting conditions. The condition of major interest was discomfort due to glare. The data do not permit us to reject the Adrian-Schreuder formula as a measure of the discomfort due to glare experienced by Ontario drivers.
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