In the city of New Orleans, only 39% of adults meet physical activity recommendations, compared to 47% nationally. Walking has been recognized as the most common and feasible form of physical activity because it is affordable by everyone, and is readily incorporated into one's daily routine. While older urban areas like New Orleans have features that should enhance walkability, they sometimes also have distinct barriers to physical activity such as crime and a varying degree of destinations to walk to. The purpose of this study is to explore environmental influences, particularly crime and neighborhood destination density, on different types of walking behavior. Specifically, the investigator will examine the relationship between objectively-measured crime rates and both exercise-related and transportation related walking. The relationship between objectively-measured density of food stores and both exercise-related and transportation related walking will also be measured. The findings from this study will contribute to the understanding of the environmental determinants for walking in low-income, urban, minority populations.