&quot;On that topic: I wish we could have acoustical limits on vehicle noise.&quot;<p>I&#x27;m fairly certain there will be in your country. There are in the UK at least - it&#x27;s a requirement that&#x27;s supposedly checked when vehicles have their annual roadworthiness test. The problem is A) it&#x27;s a subjective measure, open to the testers judgement and B) there&#x27;s nothing stopping the owner re-tuning their vehicle before &amp; after the test to get a pass. So ultimately, it&#x27;s just not policed.<p>Let me preface this with &quot;I do not have any data to back this up&quot; but my gut tells me about 90% of road noise is caused by 10% of traffic. In London at least.<p>&quot;Those loud motorcycles with the fat pipes: they seriously need to control those.&quot;<p>I&#x27;m totally with you on these, but really it&#x27;s any of these two-stroke bastards, even mopeds these days. The fashion is to tune them to the point of nuisance.