About an hour at highway speeds.
They have large blind spots to the rear and on the sides.
You go to an actual truck driving school.
Yes, but you can't drive it.
You go to a truck driving school and learn how to drive a truck.
I know of no world record for miles on a semi truck. I know of one that has over 3 million miles on the odometer but I would bet there are some with even more.
Someone who has been trained and licensed to do so.
Truck driving school and some follow-on training.
An average semi 'tractor' is about 30 feet long.
jump in front of truck traveling 75 miles semi truck
You need to be 16 years old to drive a semi truck all over the United States of America.
You can drive barefoot if you wish, although it probably would not be a recommended practice.
If they own a one-truck company and drive for themselves, profit will be dependant on their margins. For example, a driver that drives from CA-FL and back year-round will make $60,000 to $90,000 profit, depending on how many miles they drive and how they run their company.