A bit of nostalgia...I checked my boyhood hometown, which I still return to for the holidays. In grade school we lived on one of the major east-west streets, though we were on the east end of town so traffic wasn't too heavy and it was just two lanes.
Somebody posted that a 14 block stretch of the street was a speed trap, because the speed limit was 25 in that stretch and most people assumed it was 35 like the rest. My home was smack in the middle of that stretch. Someone else posted a comment that reason for the low speed limit was that it used to be a neighborhood with a bunch of kids in it, plus a public and a catholic grade school, but now the neighborhood is older, with less kids, and they could probably raise the limit.
That comment is so true! Every once in awhile I'd see a cop posted just up the street, over the crest of a hill. And almost every house had 2-5 kids, and we were always crossing the street to go to the ball field, or chasing a basketball that rolled down my driveway into the street. Sometimes I drive by when I'm back, and don't see many kids in yards or at the ballfields anymore. The public school had nearly 1500 kids when I first went. Now it's at 492, and I don't see any new schools that drew away from it.