 The Meadowbrook State Parkway ( also known as the Meadowbrook , the Meadowbrook Parkway or the MSP ) is a 12 @.@ 52 @-@ mile ( 20 @.@ 15 km ) parkway in Nassau County , New York , in the United States . Its southern terminus is at a full cloverleaf interchange with the Bay and Ocean parkways in Jones Beach State Park in Wantagh , New York , and its northern terminus is at a partial cloverleaf interchange with the Northern State Parkway in Hicksville , New York . The parkway is maintained by the New York State Department of Transportation . The Meadowbrook Parkway was constructed by the