Originally Posted By: MarkO
I've felt comfortable and safe sometimes driving 2x the speed limit and there are times I've not felt comfortable at 2/3rd the speed limit.


You make a good point here, and I agree that you have to consider local conditions in determining your speed, but I can't think that driving, say, 80 MPH in a 40 MPH zone is ever a good idea.
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Geezer in Chief