[eyelidlessness]

This seems very location specific. Where I grew up (DC suburbs) sound systems and loud engine noise were common and I’d agree with you that was the problem.

Where I live now (Seattle) neither are common but traffic congestion and impatient drivers are. Horns aren’t used for safety, they’re used to communicate crowded aggressive driving.

I agree with GP that for this scenario restricting cars overall is a better solution. The laws on the books certainly apply but they’re only enforceable in a meaningful way if you have traffic cops on every arterial. And that’s not something I think anyone wants.

> I'd even go so far as to posit that the link discussed between noise and heart health is actually via psychological stress, rather than physiological stress.

Why is this even a distinction? The psychological stress leads to the physiological stress impact on heart health.