The Belt Parkway, also known as the Belt System or Circumferential Parkway, is a series of limite-access highways that form a complete circle around the New York City boroughs of Brooklyn and Queens on Long Island. The system is composed of four separate parkways; however, three of the four are signed as the "Belt Parkway". The three parkways that make up the signed "Belt Parkway" are 25.29 miles (40.7 km) long.