I have a problem with the amount of noise cars and bikes make. Ideally it should be none, but I do have an idea of what they could have done.
They should have never allowed loud cars and bikes to exist in the first place, because why would you even do that.
You know how countries are usually separated by sections / states. A solution to the problem that is already there would have been to make a forbidden loud car and loud bike state. If you are unhappy with the noise in your state you could simply move to the one with the right rules. People could “vote” for what they want by simply moving.