Look at the two guys. They look like they are standing maybe 3 feet from each other.
But when you look closely, the guy between the rails is lined up roughly with the shadow of the front of the white truck.
The guy who is bent over is lined up (to my eye) a little bit closer to the camera than the shadow at the rear of the truck. The truck is roughly 20 feet long. Those guys are roughly 20-30 feet from each other, but they look like they are right next to each other. That because of how the picture was taken with a telephoto lens.
Similarly, the track had the bends to it, and we might think those bends occur in about 20 feet or so of track length, but I bet it's more like 100 feet of track length. I have no real way of knowing based only on this picture. I can't see the ties clearly enough to count them.
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