Feeco Depot is a main transportation hub and rail station. It's a main thoroughfare through which industrialists travel, as well as freighting supplies. It is not shut down or in disrepair. Judging by some of the backgrounds and the high security, it's safe to assume that Abe was just exploring all the places the public doesn't usually have access to. Remember that he got to where he was by
falling off one of the handcars. Abe, a known terrorist to the industrialists, couldn't very well saunter through the main terminal where all the passengers were waiting.
Certain things in the background support this. One of my favorite screens comes to mind, where we see where all the cargo is stored in a giant warehouse. This isn't the kind of place that would be open to the average transient.
I think the announcements would be a nice touch. There are certainly some areas that should remain eerily quiet and just let the lovely music set the mood. Perhaps the closer Abe gets to a terminal, the clearer the announcements become.
It would also be a nice touch to add a scheduling board somewhere, with all the arrivals/departures listed. List some of the trains as "delayed", and mark that any trains departing for Soulstorm Brewery have been cancelled due to security risk.