Where you pulled over in Philly? If so take it to court. There is a good chance the officer will not show. (They dismiss the charges). Ask to see when the unit was last calibrated. Ask to see when the officer was rated to use the radar unit. Did he have proper training? If he had no training???? Were you on the highway alone? Were there other cars around you? Did he pull over the right car? Many questions to be answered!

Check website "Radar Roy".

Howard