As we celebrate National Bike or Walk to School Day today, it is important to recognize how our culture has changed transportation behaviors. In 1969, riding your bike or walking to school was commonplace, and nearly 50 percent of kids chose that mode of transportation. By 2009, that number dropped to just 13 percent. What is causing kids and their families to opt for a four-wheeled ride rather than a walkable route? How can we help reverse this pattern to protect our environment and promote healthy behaviors?