1. Notice I said tires optimized for road noise.
2. Most suburban homes in the US are far enough from roads with 55 mph speed limits that high speed road noise isn’t penetrating the home.
On small roads between the blocks ("strefa zamieszkania") it's 20 km/h. Also pedestrians have right of way over cars on these roads everywhere, no matter the crossings. Usually these roads are made of bricks and have these "bumps" so you won't go much faster even if you wanted to. That's the closest road to me (like 50 meters from my flat).
On regular roads it's 50 km/h. There's one like 300 meters from my flat.
On a few big multilane roads it's 90 km/h or more but the closest such road is 700 meters from my flat, and it has these noise-cancelling panels around it.
It's worth adding that 90%+ of Polish drivers ignore speed limits...There's hardly any police or speeding cameras (apart from a few selected areas which everyone knows about, and does not speed there), so the speed limits really work on sort of "opt-in" basis.
