do you mean the actual motor on the trucks are geared or have some sort of mechical governing circiut in them that limits the speed?

i think if congress tried to do that to truck (and if thought about it for cars) it would be makings of a second american revolution!

people might believe in free speach and still support some censoring of words, books and art, but give up our right to speed on a highway? them would be fight'n words on americas roadways.

i have had the experience of driving 70+ mph on road posted for 55, and then caught site of a cop car behind me... with out light or sirens, its just zipped on by, leaving me eating it's dust... speed limits are like suggested retail prices... a guide, but not one that most take seriously, except on small local streets.