How many men man a modern freight train?

I know it is probably not just the engineer. This is a train that goes through my area in a trench (great invention) carrying resources locally from town to town and beyond. It is because of the trench that I can enjoy the train, much muted, like a train in the movies. So the trains pass invisibly. But I get... show more I know it is probably not just the engineer. This is a train that goes through my area in a trench (great invention) carrying resources locally from town to town and beyond. It is because of the trench that I can enjoy the train, much muted, like a train in the movies. So the trains pass invisibly. But I get this recurrent idea that some day, one day, in a rare occurence, the train will stop and the railroad men will come up on ladders up onto the lawns.
So I am wondering how many railroad men make up a typical crew?
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