 In reality, however, NY 205 continued to begin at NY 23 for most of the early 1970s as all of I-88 had yet to be built.The extension finally materialized following the completion of I-88 in the vicinity of Oneonta.The newly extended NY 205 connected to the freeway by way of a overlap with NY 23 and a new highway linking NY 23 to an interchange with I-88 at the Oneonta city line.