Unusually, the mileage count on the reference markers on NY 109 begins at the route's eastern terminus at NY 27A in Babylon and increases as the route heads west and north toward Farmingdale. This runs contrary to the New York State Department of Transportation's standard practice of inventorying an east-west route from west to east.
Route description
NY109 running west from NY27A in Babylon
NY109 begins at a fork in the road from NY24's western segment (Conklin Street) in the Nassau County village of Farmingdale. It proceeds eastward as Fulton Street in Farmingdale, a four-lane commercial arterial through the town, passing multiple apartment buildings. At Main Street, a median starts developing in the center, dividing NY109 as it crosses through a residential section of Farmingdale. Soon crossing back into the town of Oyster Bay, the route parallels the Central Branch of the Long Island Rail Road as it heads through town. After crossing into another large commercial district, this time in the hamlet of East Farmingdale in the town of Babylon, Suffolk County, NY109 enters a partial cloverleaf interchange with NY110 (Broad Hollow Road).[4]
NY109 westbound at the junction with CR2 (Straight Path) in Babylon
Now known as Farmingdale Road, the route passes a jughandle for Republic Airport. NY109 crosses into an interchange with the Southern State Parkway and the Corporal Tony Casamento Highway. NY109 changes names to Babylon–Farmingdale Road, passing south of Mount Ararat Cemetery. The four-lane arterial crosses through a large industrial section of Babylon, entering an intersection with County Route3 (CR3; North Wellwood Avenue). Changing over to a commercial neighborhood of Babylon, NY109 remains four lanes, crossing an intersection with CR2 (Straight Path). A short distance later, NY109 enters an interchange with NY27 (the Sunrise Highway) right where the boulevard form converts over to a limited access freeway.[4]
NY109 continues east through Babylon, crossing between a commercial and residential neighborhood. Proceeding southeast, the route enters an intersection with Little East Neck Road North and CR96 (Great East Neck Road). NY109 changes names to Little East Neck Road North and turns southeast through Babylon. The four lane boulevard crosses into Argyle Park, crossing under the Long Island Rail Road Babylon Branch and into an intersection with CR12 (South Railroad Avenue). NY109 bends southward through Argyle Park, remaining four lanes into Deer Park, where it meets an intersection with NY27A (West Main Street), the eastern terminus of NY109.[4]
History
The NY109 route designation was assigned to its current alignment in the early 1930s, and the designation has not been altered since.[5][2][3] The highway has historically been known as Maywood–Babylon Road.[5]
