I recently got an idea about adding some conditions to train stations. Vehicles will stop under a few conditions which you can select:

Trains:
1. Request Stop
A train will pass through a station if no one is currently on the station, but if someone is in the station they will decide to stop. They are treated like normal train stations, but before it slows down, it checks if anyone is on the train station. If not, the train will not slow down and go to the next stop, otherwise it will slow down and pick up passengers as usual.

2. Chance/Limited Stops
You can set the chance that a train can stop on a train station. After the train departs the previous station, there is a chance that it decides that it will stop at the limited stop station, otherwise pass the station like if it wasn't even selected as a station in the first place.

Buses:
1. Request Stop
A buss will pass through a station if no one is currently on the stop, but if someone is in the stop they will decide to stop. They are treated like normal bus stops, but before it slows down, it checks if anyone is on the bus stop. If not, the bus will not slow down and go to the next stop, otherwise it will slow down and pick up passengers as usual.

I think this would be a very cool idea and I hope someone makes it