The next time you are on the highway- try a experiment to answer your question of Why??
With cruise on and running the speed limit or a little more, you approach a vehicle slowly and over take it. without slowing down, pass the slower vehicle and stay in the fast lane until you are at least 125 feet past the slow vehicle. This is about the average length of a truck and trailer. How long did it take?
With computer controlled speed and logbooks, truckers can't speed up to pass and to run as many miles (how they are paid) in the allotted driving time, can't afford to slow down. With traffic jams, construction zones, hills, etc. they have to keep the wheels turning to make a living. Modern trucks will shut down if you run beyond the hours allowed by law.
Most people don't realize that a commercial driver can be ticketed for speeding just off the 'black box' that are on most trucks. They can even be cited from time stamps on fuel receipts, toll receipts or load paperwork.
MOST truckers are hardworking people trying to make a living with more government regs than any of us could imagine.
My wife and I drove a truck years ago, about 250,000 miles in a year for one outfit hauling produce from California to Miami, Fl- We made a turnround trip a week! (averages about 680 miles a day).
Truckers today will lose their license if they get a couple of moving violations in 3 years.
Remember this, If you use it, at some time it was on a truck!
Respect the men and women that keep goods on the shelf for ALL of us, I do.
:2cents: