A route that connects the freeway or through highway with the downtown and commercial areas of a city or town are found along business routes. The business route is typically the original alignment of the highway before a freeway or bypass route was constructed. Interstate business routes are identified by green business loop or business spur shields. A business loop implies that the business route will return to the parent route, while a business spur implies that the business route will only spur into the commercial area and not return to the parent route. U.S. and state routes frequently identify their business routes with a “BUSINESS,” “BUS,” or “BUSN” banner above the shield. Almost every state in the United States uses business routes for its Interstate, U.S., and/or state routes.