Charles Marohn, President of Strong Towns, talks with EconTalk host Russ Roberts urban development and what makes a strong town. The two discuss how the post-World War II approach to town and city planning has led to debt problems and wasteful infrastructure investments, and how changes as small as the width of roads make cities more vibrant. Other topics discussed include central Detroit today as a model of city growth, the incentive problems associated with how state and federal infrastructure funds are distributed, and Marohn's efforts to change civil engineers' perspective on growth.