Moon, I kinda get what you are saying, but in 1024 characters I must:
(1) Identify “what/who” I am (2) Give details about what I do (3) Show why you, the reader should care about me (4) Craft a human angle to the story (5) Wrap the story in a logical flow. (6) End the story leaving you satisfied.
Sometimes I don’t balance these factors well for every reader. It’s a weakness I am working on by writing here.
I agree with moon that the balance could be altered to make the story stronger, but I wouldn’t want the incident at the end any longer — its chill briefness is just perfect. I would rather have less description of what a railroad signal does (as we all in the developed world are familiar with that) and more about the signal’s “personality.” How did it feel about its work? Did it have hopes and dreams? What were they?
Overall, a very original idea and a well-told piece.