How does the railroad station setting parallel the message or concerns of the story?

I like to read the
train station setting as a metaphorical parallel to the situation of the couple. The young woman
in the story is pregnant and so is dealing with a "scheduled arrival". Unless
something is done, the baby will come.

Similarly, a train will come into the
station and when it does, the inevitable future will have become the present. Both characters
will get on that train and ride to a predetermined destination. They would like to think that
when they arrive there, it's still possible for them to be together and in a relationship, but
they both seem to know that this is not the case. When they get off the train (i.e., when the
baby is born), everything will be lost and they won't be able to stay together.

The couple has a chance to leave the station. They could avoid seeing the train, if
they both wanted to turn away from that path. However, thier decision has already been made.
They disagree about whether it is the right decision, as symbolized by the man crossing
the...