It is not the answer, but I would like to introduce you a site
named "fictitious railway Southwest express Conference" at
http://www10.atpages.jp/panzerfalcon/ .
They are using Visio since the times of Visio4,
and making various railway maps, fantastic 3D view of the
inside of station buildings, and time tables.
Though this site is written in Japanese,
you can translate into your language with online automatic translator in internet.
Here I attached one of their railway maps.
I hope you enjoy this site.