I can't hear a single engine, but I can hear the hum of tires a long way away. Sure, I can sometimes hear a loud exhaust but those come and go in seconds. Tire noise is a 24x7 sound until winter (snow attenuates sound really well).
Source: typing this in a city with lots of roads and traffic.
We live on a semi-main road. Normal engines aren’t really noticeable or annoying. Nearly all of the road noise is generated by tires with a fraction coming from large truck engines and vehicles with broken exhausts.
Tires are an issue but diesels engine trucks and semis are audible. Also some times regular gas customers have modified exhausts. Tire noise is higher frequency though.
Not really. Go stand next to a highway sometime: the vast majority of the noise you're hearing is from tires, not engines. You'll notice the engine noise occasionally: it'll be from some moron who's modified their exhaust to be louder usually. With all the other cars, you're just hearing tire noise.
I'm surprised that noise propagates far enough for you to hear. In my experience, the noise that propagates furthest from roads is the low frequency tire rumble.
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