Two articles on speeding, one from Techdirt about how GPS can dis-prove a speeding allegation:
GPS Tracking: Drivers' New Best Friend?
The second from the New York Times about police over-enforcement and beating (stemming from alleged traffic violations) leading to a drivers' rebellion in Russia.
Weary of Highway Bribery, Russians Take on Police.
They are both rebellions against extortion, one extortion has a slightly greater veneer of legitimacy (it is the state seeking the payoff rather than the individual officers), but in the end it is the state's monopoly on the use of force as Max Weber put it, that enables this practice.
(Yes of course, speeding is wrong, but wrongful enforcement is also wrong).