I wonder if the %age of infractions (across a range of severities) tend to be the same across all races. Because if it is, the white people should be pulled ov

I wonder if the %age of infractions (across a range of severities) tend to be the same across all races. Because if it is, the white people should be pulled over at least 3x times more. Another thing I dot understand: when a cop pulls over a vehicle, how is it possible for the cop to know if the car is being driven by a black person or not? so, it is possible that of all those pulled over, a greater %age of black drivers get ticketed for smaller infractions.