How to keep trains moving in Cities Skylines: As we all know trains are the best way to keep our cities moving. But they can also get jammed up like roads. I find making under ground loops the best way to keep trains moving. By looping the track going down to the lowest point and than make it go up a bit doing it the same way and down and so on. Untill you need to get back up. Just loop it untill you get back up.

The screenshot is from TS2017. I did take it.