The M60 motorway, Manchester Ring Motorway, or Manchester Outer Ring Road, is an orbital motorway in Greater Manchester, a metropolitan county in North West England. Built over a 40-year period, it passes through all Greater Manchester's metropolitan boroughs except for Wigan and Bolton. Most of the City of Manchester is encompassed within the motorway, except for the southernmost part of the city (primarily the Wythenshawe area and Manchester Airport), which are served by the M56.