Since the earliest days of civilization, streets have played an important role in shaping society - but what is a street? Is it a living ecosystem, a public space, a social space, an economic space or a combination of these? The focus on automotive travel over the past century has changed the role of streets in cities. This has degraded the quality of urban life and contributed to public health issues. This book offers a unique look at streets as locations that can evolve to support the economic, social, cultural and natural aspects of cities. Using modern urban design examples, it challenges readers to focus not only on the livability and travel benefits of roads, but on how the power of streets can be harnessed. In so doing, it shapes more dynamic spaces for walking, biking and living, and aims to stimulate urban vitality and community regeneration, encouraging policymakers and individuals to make changes in their own communities.