In 1996, I was living in Waukesha, Wisconsin and working for Pentrex Publishing as the Editor of Pacific RailNews. One evening shortly before sunset, a heavy fog settled in. Twilight is my preferred time to make signaling images because lower light in the sky allows for greater emphasis of signaling aspects. Fog is an added attraction, especially for searchlight signals. This style of signal head was developed by the Hall Switch & Signal Company in the 1920s. The searchlight uses a miniature semaphore in front of a focused beam of light that allows for a very low powered lamp to be sighted at a great distance. This effect is most evident when the focused light beam illuminates water droplets comprising heavy fog.
I made a series of images of this General Railway Signal Company searchlight along CP Rail’s Soo Line former Milwaukee Road main line at Brookfield, Wisconsin. A variation of this image was selected for the cover of my book Railroad Signaling, published by MBI/ Voyageur Press.