At the same time, many state highways that were previously unnumbered received designations.
Because some of these route numbers are no longer in use, the pattern of clusters is not fully apparent today.
At the time, New York only assigned numbers to a small subset of its state highways.
An asterisk (*) in the "Pre-1930 designations" column indicates a segment of highway that was previously unnumbered.
If the cell in the "Pre-1930 designations" column is empty, then the entirety of the highway was previously unnumbered.