Lol, that depends heavily what you consider staff. E.g. look at freight, if you move cargo by trucks you need 1 staff member (sometimes called drivers) per truc

Lol, that depends heavily what you consider staff. E.g. look at freight, if you move cargo by trucks you need 1 staff member (sometimes called drivers) per truck. Train on the other hand needs only 2 people per hundreds of meters of train... Even worse for individual car transport. You need one staff (driver) per vehicle...