The kansas state university discomfort glare research program, which began in 1970, has supported research on discomfort glare from roadway lighting. Early experiments on static, single sources that made use of the north american discomfort glare criterion and the subjective judgments of observers required special multiple probit analysis to render the results reproducible. The data consisted of determinations of the borderline between comfort and discomfort (bcd) as functions of observer and source characteristics. Personal qualitiessuch as age, sex, and eye color were correlated with glare. Source characteristics included duration of exposure, distance, size, number, and spacing. Further studies were made concerning the stability of observer responses with the passage of time, both for short and long time intervals. More recently, a dynamic simulator has been constructed in which the observer is placed in the driver's seat of a part of a car body, and four lighting systems are alternately used to simulate real-world glare conditions. This paper appeared in transportation research record no. 1149, Visibility for highway guidance andhazard detection. For covering abstract see IRRD no 817811.
Samenvatting