As cities strive to become more sustainable, livable, and healthy, they are increasingly becoming multi-modal. In 2014, Americans took 10.8 billion trips on public transit, the highest since the dawn of the highway era. But most of these trips are on streets that were designed to move private cars, with transit as an afterthought. The NACTO Transit Street Design Guide, a four-color book, places transit where it belongs, at the heart of street design.