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On the side of a case for a American Train Crossing Light there's a hole in each side. The white light from the crossing light shines through this hole when the crossing lights are flashing. This hole is usually parallel with the train tracks. Is this there so the engineer can tell how far they are from the crossing, or is this just how the frame was molded? Also the other day I saw a crane that was made for on the railroad tracks because they're replacing ties up by my grandma's. There was a coupler on the back of this crane. Is that so a train can pull the crane?Thanks in advance to anyone who gives correct answers!Adam
Could be to let approaching train,or signalman know light inside signal is working.When lamps were oil lit,each signal box could see light of lamps from such sight holes,although not being able to see colour of signal,only train could see that.If no light,no signal,plenty danger.
I've also seen some of that curious machines which work on the rails. They usually have diesel engines, so they can move without need of a loco pulling, but I think the coupler is still needed to pull other cars containing materials couple two or more of them to make a single consist tow them in an emergency if they are broken or not working Umberto
Those are good points, but another possibility is that even though they have their own power, they probably won't run by themselves for long distances (due to safety, comfort, and fuel concerns). If they have to travel long distances, they are probably pulled as part of some larger train.
On one side of the crossing here they have no signs that say W on to tell the engineer when to blow their whistle but on the roadbed beside the tracks at some places there they have a white line painted. Is that to tell the engineer when to blow the whistle?Also how's come the W signs aren't placed real close to the crossings? They seem so far away.Adam
>On one side of the crossing here they have no signs that say >W on to tell the engineer when to blow their whistle but on >the roadbed beside the tracks at some places there they have >a white line painted. Is that to tell the engineer when to >blow the whistle? > >Also how's come the W signs aren't placed real close to the >crossings? They seem so far away. > >Adam Well that because trains travel fast, and an engineer needs time to blow the horn to alert people the train's coming. If the whistle post was closer to the crossing that means he has less time to do so. It's a safety thing.
