This conurbation forms part of a megalopolis of 9.4 million across northern England. The New York metropolitan area is part of the larger Northeast Megalopolis. The Quad Cities Metropolitan Area is also considered part of the Great Lakes Megalopolis. Delaware is centrally situated in the Northeast megalopolis region of cities along I-95. The Cincinnati metropolitan area is considered part of the Great Lakes Megalopolis. It is the most populated and largest megalopolis in North America. This corridor occupies the northwestern fringe of the megalopolis. This capital is part of the megalopolis centered on Mexico City. Baltimore County is part of the Northeast megalopolis, which stretches from Virginia northward to Boston. The region lies roughly at the geographic heart of the Northeast Megalopolis. A "megalopolis", also known as a "megaregion", is a clustered network of cities. Metro Detroit is at the center of an emerging Great Lakes Megalopolis. A portion of the region also encompasses the Great Lakes Megalopolis. Northeast Ohio and the Cleveland CSA are also part of the larger Great Lakes Megalopolis. Tijuana, Mexico is part of the Southern California megalopolis.