Train Sim World 3

(had to create a new profile as I'd done a load of miles on this on TS2).

Create a scenario for the train practice centre. Pick a start place that's on the outer oval. Doesn't really matter where it finishes.

Start. Get up to speed and walk away. (make sure your pad is plugged in)

Come back 4 hours later.

Note: the achievement tracker doesn't seem to count up as you're doing this but I assure you, once you exit and go back to main menu it counts and should pop.

Should work for any of the "drive x amount of distance units)