round where I live (in England) they've suddenly put up loads of 20mph signs, terraced houses, narrow roads, often have to stop to let a car come down before you can go up, and there's a couple of schools, so it's sensible, as ppl often put their foot down to get to the end of the roads first....
....but it's also 20 now on the main roads near by where 30 was fine, wide enough roads, which have islands every now and again and crossings so you can safely cross
2 lead down down to a dual carriage way!