My latest station project that I've been working on.

Features:
30 Railway Destination Selection
Call Minecart with a button
Triple Minecart Dispenser System (Each dispenser refills the main one any time a cart is called)
Choice of cart overflow method. (Lava disposal or Cart Return)
Empty Cart Detection Outgoing/Incoming (Any empty carts detected are sent to the dispensers)
Dispenser Indicator Light (Will flash shortly after calling a minecart, no flash indicates the system is empty)
Cart Waiting System (Prevents too many carts traveling at the same time, waits for one to clear before resuming)

As this was my second station build it may be a bit sloppy in places, I would start building something and change my mind halfway through and change it to something else, I planned the station as I was building so it's not as good as I'd have liked it to be.

I have several other features I plan to implement in the future, as well as compacting this as much as I can.

Additional Notes

I covered up the station rather quickly so there may be a few parts that aren't covered or a few torches that are showing. I can provide an uncovered schematic too if people would prefer it.

Link to Smeag0l's station which I got a few ideas for this station from.
www.planetminecraft.com/project/redstone-train-station-with-double-dispenser-system-617930/