“An urban transformation is underway, and smart streets are at the heart of it.” These are the words of Samuel Schwartz, a man who spent two decades as New York City’s traffic commissioner and managed to walk away from the experience an optimist. He’s just written a book titled, “Street Smart: The Rise of Cities and the Fall of Cars,” and he joins us this hour with a look back at how city streets were taken over by cars… and how those streets are beginning to get reclaimed by pedestrians and bicyclists. Also joining us this hour: urban planner and architect Klaus Philipsen, for a look at transportation possibilities and problems here in Maryland. Our state just got a grade of D on its transportation report card and the Central Maryland Transportation Alliance's Brian O'Malley tells us why.