was it known by any other name earlier?
UNANSWERABLE
which places are connected by new york state route 146? Gallupville, Mechanicville and Schenectady. which counties does it pass through? Schoharie County. when was it designated as route 146? 1930
wiki:23139967
New York State Route 146 [SEP] History
NY 146 was assigned as part of the 1930 renumbering of state highways in New York and originally extended from NY 43 (now NY 443) in Berne northeast through Schenectady to US 4 and NY 32 in Mechanicville. The portion of the route northeast of Altamont generally followed its modern alignment; however, west of Altamont, NY 146 followed what is now NY 156 to Berne while NY 156 was routed on modern NY 146 to Gallupville. Although it was signed as part of NY 156, the Gallupville–Altamont highway was locally maintained until 1939, when it was acquired by the state of New York.