Is your feature request related to a problem? Please describe.
I always don't know the Car or Door number.For example,the long of the platform is 12 Car but the train is only have 8 Car so stand at 12 Car will miss the train.

Describe the solution you'd like
add the Door and Car number sticker at platform gate/door or on the floor with no platform door/gate.

Additional Information
the sticker on the platform gate:

the sticker on the platform door:

the sticker example:

the sticker photoshop by myself on the platform:

This can be manually added using other mods like Slideshow. Since you can have multiple train types running on a line with different car/door numbers, it will be hard to implement this.