Was actually quite surprised by how "civilized" the driving was in our recent China trip. Don't think I heard a horn once in probably 20h or so as a passenger, did find the drivers up in Heliongjiang a bit bold with their lane weaving but in Beijing they drove great!

Clear rules, and consistent enforcement works.

Noticed something similar with littering, right now they have to employ an army of old folks to pick up cigarette butts. But I suspect once people come to expect clean surroundings that enforcement of littering fines can become a thing and the culture around respecting public spaces will slowly change. We even caught a young kid full on lecturing their grandparent for spitting on the street.