>>Some slow down and speed up going up and down grades, some don’t.<<
If one truck is hauling a load of light bulbs he won’t vary much but if the other truck is hauling a full load of heavy product then his speed will vary. Not everyone is a successful owner operator with a large horsepower engine in the truck.
Oh, I know. I think the truckers are way less likely to be idiots, I think the majority try to do the best they can. I do think that things like having a computer record speed that goes over a certain mandated speed perhaps causes more problems than it solves. I think the food lion trucks were mandated to not run over 61 for a minute or it would be recorded.
I tried to find the national average for truck traffic on 4 lane interstates, but my google skils are weak. 81 runs 19-40% truck traffic, according to VDOT.
Freegards