NY 31A. In the 1930 renumbering of state highways in New York, the Niagara Falls–Sanborn leg of NY 31A became part of a realigned NY 3, which had followed modern NY 425 from North Tonawanda to Saunders Settlement Road prior to the renumbering. Despite this fact, NY 31A continued to extend west to Niagara Falls, creating an overlap with the cross-state NY 3. The overlap remained in place until when US 104 was assigned across Upstate New York. West of Rochester, it replaced NY 31, which was shifted southward to follow all of NY 3 from Niagara Falls to Rochester. NY 31A, meanwhile, was eliminated and partially replaced with NY 429, a route created that continued south from Sanborn to North Tonawanda via Ward Road and Oliver and Wheatfield Streets. NY 429 has not been substantially altered since that time. Major intersections See also References External links 429 Transportation in Niagara County, New York Niagara Escarpment