One way of combating rising obesity rates and decreasing physical activity levels among children is to promote active transportation to and from schools. The award-winning I-WALK program provides a comprehensive framework for addressing community walkability and related infrastructure. The program uses a unique and innovative methodology that combines volunteer data collection workshops; classroom-based teacher tallies; and a dynamic Web-based survey that brings parents and children together to discuss school transportation issues. The program's success demonstrates the benefits of coalition-building and community-based participatory research approaches to designing healthy and safe local environments.