During the 1940s, education systems would influence the operation of school buses. School bus ownership transitioned, shifting from single individuals hired by school districts, to fleets of buses operated by bus drivers as district employees. Following World War II and the rise of suburban growth in North America, demand for school busing increased outside of rural areas. In all but the most isolated areas, one-room schools from the turn of the century were largely phased out in favor of the multi-grade schools introduced in urban areas. In the suburbs and larger urban areas, community design often made walking to school impractical beyond a certain distance from home, particularly as students progressed into high school.