 In the early 1940s, NY 30 was rerouted to follow a new highway that left the old alignment of NY 30 southeast of Central Bridge and connected directly to the portion of NY 30 north of NY 7.The former routing of NY 30 into Central Bridge became an extension of NY 43, which overlapped NY 30 between the new alignment and Schoharie.In 1956 and 1957, an arterial highway was constructed between Johnstown and Mayfield by way of Gloversville.