I recently moved from Brooklyn to Phoenix. I'd have an easier time of letting my 4-year-old walk on the sidewalks of Brooklyn than anywhere in Phoenix. The driving is so much worse and so much faster here. Cars are also my biggest fear going into her more independent years. People flying out of our condo complex, a 7-lane road adjacent to it, everyone rageful and in a hurry constantly. I'm far more worried about inattentive drivers than playground falls or kidnappers.