On Sun, 09 Sep 2007 20:35:54 -0400, HK wrote:

What weight and length truck do you use to haul that oversized RV of
yours down I-95? And define highway speeds, since most boat trailing
shouldn't be done at speeds exceeding 60 mph. My average highway speed
while trailing is between 55 and 60 mph. If you are pulling a boat
trailer at 70 or faster, you're going...too fast.

If you can't safely tow at the speed limit you are obstructing traffic
and unsafe. A good pickup truck and a properly set up trailer should
be able to tow at 70 mph without any trace of instability. Speaking
from experience, if the vehicle, tongue weight and tire pressure are
not correct you will be lucky to get over 55.