Turns out, officers have to go through very little training in order to properly gauge a vehicle's speed by eye. According to The Plain Dealer, visual assessment is only a portion of the five-hour course on traffic enforcement. Instructors bring recruits to various traffic situations and have them guess speeds. The instructor then checks the guesses against what the radar gun says and calculates the difference.
So let that be a fair warning to natives and passer-bys alike. Leave the cruise control on and don't bother trying to argue if you should happen to get cozy with one of Ohio's finest. It's their word against yours.
[Source: The Plain Dealer | Source Image: Noel Hendrickson, Getty]