"Sooo how are they gonna enforce this or this is more bullshit from the Supreme Court and US Gov't."
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It's really b.s., and here's why:
Once police pull over a motoris, they cannot detain him without reasonable suspicion that he has done something worse than violate a traffic law.
The phrase, "reasonable suspicion" is the clandestine 'out', and therefore, sanction for police to continue doing exactly what they are doing now with complete impunity.
After all, isn't that what cops have been using as an excuse to harass, "Stop and Frisk", illegally and unconstitutionally approach, detain, handcuff and arrest Black people in the first place.