LOL You have never driven multilane highways in Alberta in the summer? We just got back from Baja (35 hours each way) pulling a trailer and you sure don't want to drive that at 90 km/h Interstate minimum is 65 MPH or you will be run over by transports. OK the big question is can the ICE handle the 6000lb towing capacity safely? Lets say 90 km/h through Colorado?
I'll try again. If you're having trouble at those speeds, slow the eff down because you shouldn't be towing that fast regardless. A blow out or loss of control is far more severe consequences than holding up trafffic. As usual, you're using extreme examples. You're not getting run over by transporters. Yes, I've towed. Far more than you have, and yes through Alberta. Big friggin deal.
I realize this may not be directed at my post, but my point still stands.