Speeding is REALLY easy to prove. Most traffic cops have equipment that will accurately tell them your speed to the nearest tenth of a mph. Laser speed sensors

Speeding is REALLY easy to prove. Most traffic cops have equipment that will accurately tell them your speed to the nearest tenth of a mph. Laser speed sensors are a dime a dozen now. The hard part is that in the USA you have to serve speeders and can't just mail them the ticket and revoke their license/registration if they don't pay it like they do in the UK.