 The entirety of NY 448 was originally designated as part of NY 117 in the 1930 renumbering of state highways in New York . In 1932 – 33 , John D. Rockefeller offered to <unk> a short section of NY 117 that passed through Kykuit , the Rockefeller family estate , citing safety concerns . The state expressed similar sentiments in 1949 , deeming the stretch unsafe for commercial traffic . By the 1960s , the annual average daily traffic count along NY 117 had grown to 5 @,@ 000 vehicles per day , far more than the 1 @,@ 800 that the road had originally been built to serve . This led the New York State Legislature to approve plans for a new alignment for NY 117 in 1965 . The new road would be located north of the existing road , relieving traffic congestion on the Albany Post Road ( US 9 ) and NY 117 and providing access to NY <unk> , US 9 , the <unk> State Parkway and the proposed Hudson River Expressway in the North Tarrytown area . 
