Real life improvised it cause they ran out of Flatbed cars, so they just went to the scrap yard and found lots of Train axles so they just hooked trailers onto the wheels
Honestly, I don't like the Southline devs at all (including SL), but i did never wish this on them! I kinda feel bad for the SL devs, and I hope they recover after this.
They changed it a bit to have two versions. The first version is the part to connect to locomotives and the second is the rest of the train. Too complicated for bacons and I'm glad its only for Ex CSX gamepass owners.
I got it and i bought it before the CSX game pass was set to being free. Maybe check if you bought the CSX game pass before it was free because I have it in the game.