Comment Re:Should be unconditional and persistent (Score 1) 84
Sorry, but even just high speeds are dangerous. They mean a slight twitch of your muscles and you're headed off the road faster than you can correct. It probably differs from person to person, but for me 70 mph was too fast, and I could tell that it was too fast. 65 was ok, but it was impossible to keep safe stopping distance. Fortunately, that *is* strongly affected by relative speeds, but you need to be able to handle incursions from this or that (say a deer).