I agree with MMD. Fact is, sh*t happens. Regardless of how straight, how much visibility, how smooth, etc. At 170+ you have precious little time to deal with the unexpected. And as MMD says, one injury or death causes a billionfold misery compared to the rush of the run. Those of you who are surgeons familiar with victims of crashes dying in the ER know what I mean. If you need speed that much, just go to a track. 110-130 on an expressway - no problem under ideal conditions since these roads are designed for speed anyway, but 170+ on a rural surface road? Stupid if you ask me, unless its blocked off and checked.