We can promote walking, bicycling, and transit by allowing users of multiple ages and abilities to feel safe and comfortable utilizing these modes to fulfill many of their day-to-day transportation needs. This starts with slowing traffic and increasing safety with traffic calming and human-scale geometric design that forces people driving to slow down and pay close attention to their surroundings. Transportation professionals will learn strategies to manage speed by designing self-enforcing roadways and setting and designing to speed limits that are appropriate for the context.