


That would depend upon my knowledge of the local tolerances for speed. In some places, anything under 10mph over the stated limit is perfectly acceptable, in others it's 5mph over the stated limit and in a few places it's 0 mph over the stated limit.
In the area I'm currently living in I do about 10mph over the limit except on one stretch of highway, where it is widely and publically known that the tolerances are lower due to several wrecks, so there I do about 3-6 mph over the limit, depending upon how heavy the traffic is that day and weather conditions.
