The NY 142 designation was short-lived, however, as it was eliminated . By 1940, the portion of NY 142's former routing northeast of the NY 9A overlap was replaced by an extended NY 141 while the section east of the concurrency on Grasslands Road was redesignated as NY 100C.
The NY 142 designation did not endure; it was eventually removed. By 1940, a portion of NY 142's original path northeast of the intersection with NY 9A was replaced by an extended NY 141, and the section east of the concurrency on Grasslands Road was reclassified as NY 100C.