 Comparison: We conducted an 18-month controlled, quasi-experimental trial at three public elementary schools in Seattle, Washington. The intervention school was assigned a WSB coordinator who dedicated 10-15 hoursweek establishing WSB routes and implementing school activities on pedestrian safety. Each bus had its own set route to school from different locations in the surrounding neighborhoods and was staffed by several parent leaders. The two control schools received standard Seattle Public Schools resources on walking to school including Safe Route Maps, a traffic and safety committee, and school safety patrols. The primary outcomes were the proportions of children who walked with and without an adult or were driven by car to school. We used the test for independent proportions to compare the proportion of children transported to school at the intervention versus control schools. 