Unless they already are in the mod (In which case I deeply apologize for wasting your time and not doing due diligence).

One feature I'd love to see are rails that can only travel one way / force a minecart to ride one way, the best exapmle I can provide is the "Controller rail" from the mod Create. If possible ones that are adjustable so the player can choose whether they travel fast or slow.

I also want to say that You, You are doing the god's work with minecart transportation here, very nice mod.

I thank you for taking the time out of your day/life for creating such an awesome mod, and for reading this comment(?)

Try using powered locking rails!

Will do, boss.