Traffic rules and regulations are the pretext for enforcing the crime of Driving While Black. The use of traffic stops putatively for traffic safety, but in fact for revenue or harassment of minorities is wrong.
This is not to say there is no use for traffic enforcement, even though evidence is mixed as to its effectiveness. We can stipulate real enforcement probably does not reduce traffic safety. So long as there are humans driving cars, there will be humans driving cars badly. Automatic surveillance has successfully reduced much bad behavior like speeding and red-light running. This can be done systematically, and not randomly, and thereby both avoid bias and be more effective.
* There are studies about bicycle lights being effective.