This repo is a GitHub Pages deploy of the maps demo app. It's meant to serve as a simple online reference
of the game maps in American Truck Simulator and Euro Truck Simulator 2.
The map also includes a hacky routing demo at /routes.
From the forum post:
The Routes Demo is a toy page that lets you pick a starting company and an eligible ending company (based on the cargo exported from the starting company and the cargo imported from the ending company). The page will show a "shortest" route in red, and a "prefer smaller roads" route in green. Currently, the routing code doesn't take a lot of things into account, so the routes it calculates probably won't match up with what you'd see in the game. But it's good enough for a demo 😆
Discussions about the map can be found here, in the SCS Software forum.