Potsdam to Nicholville. NY 56 was truncated to end in Potsdam as part of the change. In the 1930 renumbering of state highways in New York, NY 56 was renumbered to NY 72 while an alternate routing of NY 72 between Potsdam and Hopkinton via Parishville was assigned NY 72A. When NY 11B was assigned in the renumbering, it was simply a north–south connector between Nicholville and Lawrenceville. By the following year, NY 11B was extended west from Nicholville to Potsdam, creating a lengthy overlap with NY 72 between the two locations. The length of the concurrency was significantly reduced in the early 1940s when NY 72 was rerouted to follow NY 72A between Potsdam and Hopkinton. The overlap was eliminated on July 1, 1972 when NY 72 was truncated to the west end of its overlap with NY 11B. The portion of former NY 72 southeast of Nicholville became NY 458. Major intersections See also References External links 072 Transportation in St. Lawrence County, New York