I have even better idea, since your doesn't cover biggest noise polluters IMHO - have a technical check on the car/bike that includes noise levels above certain threshold. Now I realize there may be corner cases and so on, but in general this would work wonders and so far I see 0 being done there. The thing is, certain cars and many motorbikes simply can't be quiet regardless of rpms, even in 30kmh they wake many people up through closed window.
As somebody who lived just next to very busy street for few years, there are 2, or maybe 3 main noise pollutants in the order of intensity: 1) ambulances & police, they are really properly mental level and they don't care even on completely empty 3am streets, if I don't cover my ears when they pass me it physically hurts, even with my subpar hearing of higher frequencies; 2) motorbikes like choppers by default, and all tuned rest, aka Akrapovic and similar mods should be banned in inner cities, permanently, 24/7. And 3) sports cars obviously, but they posed the least problem even in uber rich place like Geneva where seeing a Ferrari or McLaren is not unusual, and nobody looks at Porsche or below. This goes also for performance variants of ie BMW, Mercs or Audis too in lesser way.
As somebody who lived just next to very busy street for few years, there are 2, or maybe 3 main noise pollutants in the order of intensity: 1) ambulances & police, they are really properly mental level and they don't care even on completely empty 3am streets, if I don't cover my ears when they pass me it physically hurts, even with my subpar hearing of higher frequencies; 2) motorbikes like choppers by default, and all tuned rest, aka Akrapovic and similar mods should be banned in inner cities, permanently, 24/7. And 3) sports cars obviously, but they posed the least problem even in uber rich place like Geneva where seeing a Ferrari or McLaren is not unusual, and nobody looks at Porsche or below. This goes also for performance variants of ie BMW, Mercs or Audis too in lesser way.