I think it would make lots of people happy and me happy if the devs included a sandbox and career modes. Agraham10
The devs have already said they would like to add a open world career mode and right now it's pretty much a sandbox.
of course they're going to leave sandbox mode -_- also, as for the career mode: and original post: http://www.beamng.com/threads/597-Game-modes?p=7409#post7409