Greater Boston is a region centered on the city of Boston, including all communities inside of or bordering the semi-circular corridor defined by Route 128, I-95, and I-93, from the I-95/128 junction in the north (Peabody) to the I-93/Route 3 junction (Braintree) in the south, as well as a few communities directly adjacent to this area. For more information, see the Localities sub-category.