This chapter discusses sustainable transportation. We begin by noting that US cities face a significant challenge in overcoming automobile dependence as they seek to create more sustainability transportation options. We explore the challenges of deteriorating transportation infrastructure in the face of reduced government support and funding. We then examine how cities are beginning to rethink urban design and to support efforts to create more diverse, sustainable transportation, such as car and bikeshares. Transit-oriented development is a major trend in planning that holds the promise to reduce the need for automobile in cities. We also examine ways that cities link transportation to climate change and economics. We then examine how cities are taking action to reduce emissions that contribute to both climate change and localized air pollution. Finally we explore ways that cities are implementing programs designed to increase fuel-efficient transportation.