High Quality Content by WIKIPEDIA articles! In January 1930, the U.S. state of New York implemented a major renumbering of its state highways. Many previously existing numbered routes were renumbered or realigned. At the same time, many state highways that were previously unnumbered received designations. Most of the highways numbered in the 100s to 300s were created at this time, with route numbers assigned in clusters based on their general location. Several of these new routes no longer exist, so the pattern of clusters is not fully obeyed today.