Automatic metro station

Hello,

I want to share with you the latest version of my metro station. It is (should be!) fully automatic and it works with a redstone comparator clock. It has a detector that checks if the cart that leaves the station is empty and in that case it sends it back to the deposit. I didn't want the tracks to be interrupted in any way, without strange ups and downs and without having to make every station a terminal. So that is my solution.

This is part of a city that I am building and the main problem seems to be that when you go far from the station it stops updating that chunk and it messes everything up. Including a weird new bug with 1.9 where pistons "copy" themselves. Don't ask me why, I have no idea.

Let me know your thoughts! I hope you like it!