I think the reasable goal for a nuclear family with small children in a mixed-transportation future is a single car household.  I&#x27;m trying to get down to one car with three small children.  I live in walking distance to their school, I bike to work, and my wife takes the minivan to drop the youngest to her sitter and go to her job.  On weekends I take the van to take the kids to their programs while I hit the gym and then we all go shopping.  My oldest sits nicely on the bus when we do that, so it&#x27;s promising.