Policies providing incentives such as parking and commuting in other ways, and insurance subsidies promote walkability and physical activity for adults. Finally, funding policies have a strong influence on physical activity. The 2005 federal law supporting safe Routes to School is meant to facilitate physical activity and increase walkability. Two national programs that focus on physical activity environment policies are the Health and Human Services Healthy People 2020 and the National Physical Activity Plan, sponsored by numerous organizations including the YMCA, the American Heart Association and the American Cancer Association. The plan is a public-private partnership to create policies that promote physical activity for all individuals. Healthy People 2020 lists objectives to boost physical activity and also supports the recording of national data to track interventions. These are two examples of policies to promote physical activity. The Walking School Bus fits into their programs because it increases activity and translates a sedentary time of the day (transport in car or bus to school) to an active one. Safe routes to school Pedestrian injuries have found to be associated with the built environment elements, rather than with increased walking to school. Safe Routes to School (SRTS) provides federal funds for improvements of the built environment near schools with the goal of increasing walking and biking to school. The effectiveness of SRTS has been demonstrated in multiple studies. One national study analyzed data across 18 states over 16 years. The study compared rates of pedestrian/bicyclist injury in school-aged children to adults, restricting data to school-travel hours. While adult injury rates were largely unchanged over the study period, implementation of SRTS was associated with around a 20% reduction in both pedestrian/bicyclist injury and fatality risk in children. In Texas, traffic crash data over 5 years showed that pedestrian and bicyclist injuries decreased about 40% after the implementation of SRTS. In New York city, SRTS decreased pedestrian injury by one-third in school-age children. The benefits of SRTS may extend beyond children. While the national study showed adult pedestrian injury risk unchanged, both the Texas and New York studies have demonstrated reduced pedestrian injury risk in adults with SRTS interventions. SRTS programs are also effective in increasing walking and bicycling. In California, the effect of SRTS implementation varied widely but rates of observed walking and biking to school increased by 20 to 200%. Bicycle train Bicycle train is the same concept but instead of walking