 Construction of fully circumferential ring roads has generally occurred more recently, beginning in the 1960s in many areas, when the U.S. Interstate Highway System and similar-quality roads elsewhere were designed.Ring roads have now been built around numerous cities and metropolitan areas, including cities with multiple ring roads, irregularly shaped ring roads, and ring roads made up of various other long-distance roads.London has three ringroads (the London Orbital, the North and South Circular routes, and the Inner Ring Road).