Railworks America

Switch Point Simulations put out a new Dash 9 pack revamping the existing models: https://www.switchpointsimulations.com/product-page/ns-dash-9-pack

"We have reworked much of the core locomotive traction, adhesion and braking simulation to be more accurate to the real thing and less bound by the antiquated base game simulation. New features include partly simulated GE Integrated Function Displays with Distance Counter, Air Brake Setup and more, a partly simulated Diagnostic Information Display (DID), reworked cab signal scripts, reworked radio scripts and more."

Schnauzahpowahz did a video going over all of it: https://www.youtube.com/watch?v=I7sOMIFj7FQ

If the SPS guys ever did rolling stock (especially the freight cars we are lacking) I would easily pay money for them.

I installed these and tested on NS coal District. Quite well done. Be sure to read all the instructions especially the keystroke shortcuts.