But I must ask if this is the right/best thing to do. We've all seen better with TTDPatch and OpenTTD. It's open source, and it has been out there for quite a while. Why not learn from others?
Easy: Chris Sawyer owns all of the code, graphics and IP for Transport Tycoon/Locomotion, and none of it for TTDPatch & OpenTTD. Way too much code to try to figure out who owns what and give proper attribution.
Oh, I didn't mean code theft or licensing. "Learing from others", as in "realizing what others did conceptually to improve my work", and eventually, "implementing something similar". Be it for better review ratings, higher sales figures, pleasing some fans, or just for the sake of personal or professional progress as a games developer. No need to copy & paste, or even look at the source code of "the others". I'm talking about not repeating the same mistakes (if they can be called so).
If you had invented something brilliant that, in subsequent decades, other people significantly modified to release improved versions to wide acclaim, and you were then to bring out a modern/updated version of your original product, what would you do? Stick to your old, back then fine, but nowadays antiquated way of doing things, or build on the other people's improvements, like they built on yours?
I just fell that it's a shame that, as far as we can tell from the published screenshots, one of the biggest problems of Locomotion (the road and track layouts) seems to be transferred to the new TT without improvements.