Also assigned at this time was NY 364, which initially began at NY 245 in Middlesex and ended in Penn Yan. NY 364 was extended northward from Middlesex by the following year to meet NY 21A east of Vine Valley.
At the same time, NY 364 was also assigned, starting at NY 245 in Middlesex and ending in Penn Yan. By the next year, NY 364 had been extended northwards from Middlesex to intersect with NY 21A east of Vine Valley.