 The transition to sustainable urban mobility requires immediate action on multiple fronts. Current policies such as electrification, light, waiting, retrofitting, scrapping, regulated manufacturing standards and modal shift must be implemented to reduce emissions and energy consumption. However, these measures alone will not be sufficient to meet the stringent carbon budgets required by the Paris Agreement. A rapid and large-scale reduction in car use is also necessary to achieve these goals. Without increased consensus in subnational and sectoral carbon budgets, the scale of reduction necessary remains uncertain. Nonetheless, it is clear that we must act urgently and intensively across all policy mechanisms available, as well as developing new policy options. This article was authored by Lisa Winkler, Drew Pierce, Jenny Nelson, and others.