Edge cities are parts of cities that are on the edge of the city, instead of in the center. They are usually made up of big buildings, like stores, offices, and apartment buildings, and they have lots of roads and highways going in and out. Edge cities can sometimes be called business districts or suburban downtowns. People usually work in edge cities, and they may also live near edge cities or visit them to shop and eat. Edge cities are like small cities within big cities, and they are often lively and busy places.