This includes Interstate Highway beltways and U.S. Highways constructed to circumvent downtown areas. The Attiki Odos motorways form the outer beltways of the Greater Athens metropolitan area. A connectivity corridor is also proposed to integrate the beltways with the ECR elevated expressway. Louisville has inner and outer interstate beltways, I264 and I265 respectively. In the United States, beltways are commonly parts of the Interstate Highway System. It involves building beltways around major cities such as Irbid, Salt or its capital, Amman. The Belt System consists of six beltways. This often occurs on beltways and spur routes. This segment consists of upscale older couples typically living just beyond the nation's beltways. Currently there are two beltways being considered in Bakersfield. These 4 beltways can be broken down into 9 corridors. Manchester-by-the-Sea lies along Massachusetts Route 128, the inner of two beltways around Greater Boston. In 1937, beltways near Stettin and Elbing were built. Beijing is one of the very few cities to possess multiple ring roads (or beltways). One of Africa's most famous "beltways" or ring roads/orbitals is the Johannesburg Ring Road.