modern NY 31 west of Rochester—including the section between Gasport and the outskirts of Brockport—was originally designated as part of NY 3 when the first set of posted routes in New York were assigned in 1924. In the 1930 renumbering of state highways in New York, NY 3 was realigned between Middleport and Medina to follow what is now NY 31E. NY 3's former routing between the two villages was designated as NY 3A. NY 3A was redesignated as NY 3B as part of a renumbering of NY 3's suffixed routes. NY 3B was also extended eastward along Maple Ridge, County House, and Taylor Hill Roads to meet NY 31 at Knowlesville Station (a hamlet in the town of Ridgeway) by this time. The route was renumbered again , becoming NY 31A after NY 3 was replaced with a realigned NY 31 west of Rochester. Farther east, the segment of modern NY 31A from Clarendon to Brockport and what is now NY 31 from NY 31A to NY 19 became NY 3B in the 1930 renumbering. Like NY 3A, NY 3B was renumbered to NY 3C ; however, it was also truncated to consist solely of the Monroe County portion of its routing at this time. The route now began at the Monroe–Orleans county line, where state maintenance of Fourth Section Road began, and ended at the junction of NY 63 (now NY 19) and NY 3 (NY 31) south of Brockport. NY 3C was redesignated as NY 31D following NY 31's supplantation of NY 3 west of Rochester. On January 1, 1949, NY 31 was rerouted between Middleport and Medina to use NY 31A between the two locations. NY 31A was truncated to its current western terminus in Medina as a result. It was substantially extended , however, to a new eastern terminus in Brockport. The highway was rerouted east of Millville to follow a series of previously unnumbered roads through Barre and Clarendon to Monroe County, where it supplanted NY 31D from the county line eastward. NY 31A was truncated slightly to its current eastern terminus in the early 1980s after NY 31 was rerouted to bypass Brockport to the west and south on NY 31A and Redman Road. Major intersections See also List of county routes in Orleans County, New York References External links 031A Transportation in Monroe County, New York Transportation in Orleans County, New York