As of now you cant control the doors with the physical door buttons from the conductors position beside the doors. Here: (not functional at the moment) You can only control the doors with the physical door buttons from the inside of the cab car cab, above the driver. It would be great if the functional door buttons at the conductors position next to the doors were added in. Like for example: on the gallery cars you can operate the doors from the box ontop of the doorway, i dont know why something like that wasnt added in this dlc.
Hopefully you’ll be able to control them when they release the Dual mode diesel locomotive and cab car coach’s for the Lirr.