Lighting of railway classification yards

J. A. Summers: One of the difficulties in yard lighting is that space where towers or projectors may be located is valuable. The lighting of the area in the yard itself is very simple, but there are many problems which must be overcome in connection with glare and location of projectors. The intensity may be as low as 0.21 foot-candle. With such low intensities and poor reflection factors from the cars, the problem is not so simple as that of lighting an open space.