As the Baby Boomer set ages out of driving, are American cities ready to support their changing transportation needs — and what policies should they be writing right now to help seniors and their neighbors weather the silver tsunami?  Today, we're posting an extended audio version of our earlier conversation with the fantastic author, attorney, and law professor Greg Shill about his contributions to the new book “Law and the 100 Year Life”. And in it, we dig into thorny questions about whether we need to reject what he calls “design essentialism” and accept the necessity of traffic enforcement; what it will take to get America’s seniors to move to places that can support their changing mobility needs (or for the leaders of the places they already live to make it possible for more seniors to get around in more ways); and, of course, golf carts.