It's not that simple. Tyre noise produces a roughly "white noise" profile. This kind of noise is easy to attenuate using physical barriers and people can sleep with it (some people even sleep better with it).

It only takes one engine in a thousand to drown out everything else. They are specifically designed to produce a "note" and explosions which are highly irregular and impossible to not hear.

Loud engines should be repaired if possible and destroyed if not. But total road noise should also be taken into account and accounted for with increased vehicle tax.