Originally Posted by
genejockey
I was able to hit 44 mph on a descent where I usually max out at 38 by drafting a pickup with a camper top. In retrospect, and with the benefit of 20 years more experience and wisdom, drafting a stranger at that speed was probably a bad idea.
Like all things, it depends. At those speeds and with the right kind of vehicle, there can be a pretty generous pocket, enough so that you'd still have time to avoid hazards like potholes and road debris.