Directions From I-95 To 607 Herbert St, Port Orange, Fl. Take Exit 256 For Fl-421/Dunlawton Avenue. Head East On Fl-421 E/Dunlawton Ave Toward Port Orange. Continue For Approximately 2.5 Miles On Dunlawton Avenue. Turn Left Onto Herbert Street. Proceed About 0.6 Miles On Herbert Street. Arrive At 607 Herbert Street, Which Will Be On Your Right.