If you aren't old, than you're young.
And if you're young, you have time to get places. Why rush? Why risk your life driving?
Let the old people drive with other old people. It would be hilarious to see them all crashing into each other, making walking from place to place that much more fun.
People would be more social.
People would be getting better exercise.
People would be less stressed.
If you're late, you always have an excuse... "Yea, some grandma hit a tree, blocking the sidewalk. Had to make sure she was okay first too."
There would be more trains too. And trains are cool.
Less people driving means less carbon monoxide in the atmosphere, which I don't know what any of those words mean but it's probably a good thing.
Drunk driving? A thing of the past. People would be drunk all the time wandering from place to place, laughing at twenty car pile-ups.
More people walking means more walking-related inventions. Stirring the economy.
If you think about it, everything associated with cars is bad.
More shops would start up, because people walking means people getting tired means people wanting to go inside means people potentially walking into a store and buying something.
More time walking means less time home.
Make the new minimum age to receive a drivers license sixty-five, and lets start building a more friendly community.