 NY 60 and NY 83 were truncated in the 1940s to Frewsburg and Conewango Valley, respectively.NY 241, meanwhile, was cut back to Conewango in the late 1940s.The overlap with NY 18, the longest of the four initial overlaps, remained until January 1, 1962, when NY 18 was truncated to Lewiston (north of Niagara Falls) .