I've been working on the middle intersection with railways to Mavenholm, Vitellius, Cornerstone Empire and Helvanthar.
The entire ceiling has been cleared, letting sunlight in over the station. I will be making it nicer with a shop area, some plants and such.
I have also introduced the /st system here. Instead of having people press buttons at each station, they can just type in /st <destination> and they are off. Information about the stations can be found here, I would love if we could have this at all stations.
http://wiki.afforess.com/Minecart_Mania-...n_Stations
This is what the inner workings look like:
And here's how the signs are set up:
I hope this is helpful for introducing the system to other stations.
I will need at one more brick to finish this middle station though.
Update: The Mavenholm station has been started. Please connect the railway from the middle station to -183,55,-32 and -185,55,-32.

Edit: I just noticed the Cornerstone Mall is way better located than this... I think we shall dig diagonally.