Wisconsin Street Yard
Pictured here is what I assume to be the yard engine resting adjacent to the sanding tower. We, in the dark of night, are visiting Illinois Central's Wisconsin Street Yard in Indianapolis.
A friend of mine was researching ways to use multiple flash bulb pops to light things at night: this is a good example of a shot exposed using three separate flashes.
To do this we would have our cameras set up on tripods, side by side. I manned the cameras while he lit the subject. First, I would open the shutters and cover the lenses so that ambient light would not spoil things while Ron walked around to do the flashes. He would get in position and say "open." I would then uncover the lenses, he would pop the flash, and I'd cover the lenses once again till the next pop. When done I would close the shutters.
Even with this method you can see the green of a mercury-vapor street light distorting things over to the right side of the frame.
One image by Richard Koenig; taken April 17th 1976.