Corniche

A corniche carrying New York State Route 218 along Storm King Mountain can be seen on the left from across the Hudson River
The Hawk's Nest corniche on NY Route 97
The Hawk's Nest is part of a corniche which carries New York State Route 97 above the Delaware River

A corniche is a road on the side of a cliff or mountain, with the ground rising up on one side of the roadway and falling away on the other. The English language has adopted the word from the French term route à corniche or "road on a ledge", itself derived from the Italian cornice, for "ledge".