“Bicycling and walking make up a relatively small portion of commuting activity in the United States, but these nonmotorized travel modes play important roles within many of the nation’s local transportation systems. Infrastructure that supports bicycling and walking expands transportation options and may complement other forms of transportation by supplementing segments of trips. Several state and local agencies have taken steps to promote pedestrian and bicycle travel. Strategies to accommodate nonmotorized travel vary across communities, but may include sidewalk modifications, pedestrian-oriented commercial centers, or bicycle lanes to name a few. In recent years, the number of cities with bicycle sharing programs has increased considerably. These efforts reflect ongoing changes in infrastructure and travel options across the nation’s dynamic transportation systems. Such changes influence decisions people make about their trip to work. The American Community Survey (ACS) is an important tool for tracking how the nation’s travel patterns change across time and places.”