overall uniformity of road surface luminance
quotient of the minimum luminance at a point and the average road surface luminance over an evaluation area
Note 1 to entry: Where the luminance value refers only to the carriageway part of the road it can be known as "carriageway luminance".
Note 2 to entry: The overall uniformity of road surface luminance has unit one.
Note 3 to entry: This entry was numbered 17-857 in CIE S 017:2011.