Bit of an old thread but i tow at the speed or a tad below if there is a tailgater up my arse and i cannot get them on the uhf i pull over if safe.
The van the old girl pulls is just on 1.6tonne with both tanks full when i get there i do no rush not sure about the speed limiters in trucks though from the north of Brisbane down the hwy we followed a fool doing 152kph before a hill slowed him down and had to pull over as we went through the next town he caught up we pulled over and let him go i am getting too old for arguments with folk on the road,but i respect anyone that wishes to overtake.
John