The Belt System is a series of connected limited-access highways that form a belt-like circle around the New York City boroughs of Brooklyn and Queens. The system comprises four officially separate parkways; however, three of the four are signed as the Belt Parkway. The three parkways that make up the signed Belt Parkway—the Shore Parkway, the Southern Parkway (not to be confused with the Southern State Parkway), and the Laurelton Parkway—are a combined in length. The Cross Island Parkway makes up the fourth parkway in the system, but is signed separately.