It's an independent project by a couple of developers who work on the game in their spare time. The game is constantly being developed and improved, and there is currently a traffic restriction in the game, which is why the X1 line was created, if you are interested, you can read it here on the website (simt-mhd.net/), English can also be set there in the upper right corner, feel free to let me know how you like the site and the game
