Perhaps once labour costs are eliminated you can also improve efficiency by driving more slowly (in a truck-only lane on the freeway). You could also draft just

Perhaps once labour costs are eliminated you can also improve efficiency by driving more slowly (in a truck-only lane on the freeway). You could also draft just behind other trucks. Finally I suppose you could be whatever shape is most efficient for slipping your cargo through the air without needing to worry about accommodating a pesky human.