Trucks passing trucks is most of the problems on interstates. It is magnified in hilly areas.
Do you know why that is? Many trucks are governed between 65 and 70 MPH. Depending on how heavy they are regulates how fast they can climb a hill. When climbing a hill, you do not want to lose what you got, so it is pedal to the metal and giving everything you got to get up the hill. No body wants to drop a gear because some four wheeler wants to go fast.
I traveled all over the area east of the Mississippi and from the Gulf to the Canadian border.
For 56 years.
Retired 20 years ago.
I have followed how many thousand trucks?
In the old days the trucks would bog down going up hill and be pretty annoying running side by side, but the trucks of today will run as fast as most of us have any business running.
Most of the class 8 trucks can hold 70 to 75 on any road except on the really steep mountain grades.
So anyone who bitches about having to wait for one truck to pass another......
Yes, in my day I was considered a FAST driver, but slowing to 70 for a couple of miles never ruined my day.