The second is the Homestead Extension of Florida 's Turnpike ( HEFT ) completed in 1974 , that carries the hidden designation of State Road 821 ( SR 821 ) from Florida City ( near Homestead ) through the suburbs to the west and north of Miami , connecting to the Mainline four miles ( 6 km ) north of the Golden Glades Interchange .
Its hidden designation is State Road 821 ( SR 821 ) . This runs from Florida City ( near Homestead ) through the suburbs to the west and north of Miami , connecting to the Mainline four miles ( 6 km ) north of the Golden Glades Interchange .