SCS Software has released the latest big free upgrades now for both Euro Truck Simulator 2 and American Truck Simulator which includes the new online Convoy mode.
In this new multiplayer mode players can set up and host their own private sessions (password optional) to drive with their friends or other fellow truckers. There is currently support for synchronized AI traffic, time and weather, and the ability to take the same job as other players. However, there's a number of things not currently supported like mods, AI vehicles may vanish when a player leaves, lifting bridges aren't yet synchronized and Steam invites only work through the Overlay. It''s a very fun sounding start though and a natural evolution for both games.
For now the Convoy multiplayer is limited to 8 players, although SCS say they do plan to "eventually" raise the player limit but as it's still a work in progress they're keeping it low for now. In case of troublemakers the session creator will have admin powers to remove them, plus you have the option of loading a save that will be made before you jump into a new online session.
More new improvements came to both games including an upgrade to the Photo Mode, to allow for time and weather options so you can really get your shot how you want it. There's also a new Quick Travel option to switch between locations now too.
You can buy each game from: