I think it's 10% + 2 mph.
you have to be doing 10% +2 mph to get caught
so you'd have to be doing 79. Given that most speedos overread slightly you should be fine.
yay, I kinda thought so since i have been through one at just over 80 with no consequences but I have heard of people being done for like 74/3 mph before? or am i making that up
seem to recall some politician did, but he was pulled over by a police officer and given a ticket. They made an example of him.
These automated scamera vans are just set to fire off at 79 or 68 or 57 etc..