Why did the new middle class families of the late nineteenth century move into developments on the out skirts of cities?

New middle-class families in the late nineteenth century moved to developments on the outskirts of cities primarily to escape the overcrowding, pollution, and social issues associated with urban life. These suburban areas offered more spacious homes, a healthier environment, and a sense of community. Additionally, advancements in transportation, such as streetcars and railways, made commuting to urban jobs more feasible, allowing families to enjoy the benefits of both suburban living and city employment.