In the ongoing conversation about why Americans need more biking and walking options in their transportation infrastructure, often the "it feels good," "it's better for the environment," or "it's better for your health" arguments unfortunately don't carry a lot of weight. But you start talking economics, and wealth, and industry, and people tend to listen, particularly those elected officials and business leaders who are often difficult to engage on more "esoteric" concepts. One of the most persuasive...