In 1969, about half of all American children walked or biked to school. Of those who lived within a mile from school, 87% of children walked or biked. Today, less than 15% do. This has enormous implications not only for reducing vehicle emissions and morning gridlock, but also for children’s health and readiness to learn. WalkBoston has been working on this issue since 2001, when it piloted a first Safe Routes to School Program in Arlington.