Freight generally needs to be handle all of the problems that a cab does (turning, stoplights, other cars, getting from point A to point B, etc.), mostly because pretty much all freight trucks need to go through a town/city at some point.
Additionally, they need to be able to drive at night in areas without much lighting, they need to drive for hours and hours on end, instead of just 5-45minutes, etc. Finally, they are 40+ feet long (instead of being around 15 feet long) and have much less maneuverability and a much longer stopping distance/time.
Additionally, they need to be able to drive at night in areas without much lighting, they need to drive for hours and hours on end, instead of just 5-45minutes, etc. Finally, they are 40+ feet long (instead of being around 15 feet long) and have much less maneuverability and a much longer stopping distance/time.
Sounds like a harder problem to me.