The real-world trucking company Schneider National is paying for ads in American Truck Simulator to try to convince people to come work for them.
SCS Software, the developers of American Truck Simulator, said in a blog post (via GamesRadar) that the billboards in the game are now advertising Schneider National and directing players to the company's careers website. This might not be a permanent addition to the game, as SCS said it's only in the "try-out phase." That said, the studio believes the concept "holds promise" for its own games and the automotive industry at large.
Billboards in American Truck Simulator were previously used to promote new content updates for the game.