Yep. A big road near us (2-3 lanes in each direction; also a major route into a large city) recently dropped from an 80km/h limit to 60km/h - and I understand the reason is noise pollution for nearby residents.
I’d guesstimate that in both cases, people drive between n and n+~20km/h - so while not everyone respects it, the average had probably dropped by a similar amount to the limit change.
No matter how the parent answers, on HN somebody else will come along and say "is that just your opinion, or did you conduct a study and publish a paper in a peer-reviewed journal?"
