First lay all tracks, in this case six.
Claim a track length by putting a platform on it.
Now build the full length of that platform.
Be careful to do this one by one, so that the name stays on the right track.
Now fill up the other station parts.
You now have a huge station, which can put away 3000 per month without a problem.
Note you have to make an entrance and exit connection, so that you get 2 stations 3*16.
