This paper summarizes research conducted to investigate the problem of forward visibility while driving during inclement weather such as snow or fog. A review of the literature indicates that using narrow-distribution lamps, mounted away from the driver's line of sight, would result in the lowest amount of back-scattered light. The literature also indicates that the spectral content of light can influence glare and fatigue experienced while driving under these conditions. A series of investigations summarized in this paper confirm the review of the literature and appear to indicate that beam distribution and mounting position offer more leverage to vehicle designers than spectrum, for minimizing discomfort and glare while driving during adverse weather. For the covering abstract see ITRD E123380.
Abstract