Hi burnthebox,
I think I remember the one you are talking about.
There is track made by Exactoscale (and im sure some other companies) that has sleeper spacing that does look more realistic.
This could be what was used.
Exactoscale track is supplied with the sleepers of your choice, concrete or wooden, and rail of choice, Bullhead or Flat, among others.
All you have to do is pass the rail through the chairs on your sleepers and there you go.
However, this track is slightly more expensive but in my opinion well worth the improvement in looks.
Hope this helped.