Quote:
Originally Posted by Cunnos
hmmm interesting, what exactly is a hash mark though? As my friend was saying, its one thing if a cop gets you on the side of the road with a radar gun or you drive by them going to fast, but how accurate can a helicopter or airplane be? Thats what my friend is trying to figure out
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Those lines going across the road on the highway... The airborne officers will time you from line one to line two, then divide that distance by your time, arriving at your average speed between two points. If the points are 1/2 mile apart and it takes you 24 seconds to go from line one to two, you're doing about 75 mph...