In 1932, the Highway Department of the U.S. state of Connecticut (now known as the Connecticut Department of Transportation) decided to completely renumber all its state highways.
In 1926, at the behest of the American Association of State Highway Officials, four of the nine New England Interstate Routes that passed through Connecticut became U.S.
At this time, the adjacent states of Massachusetts and Rhode Island abandoned the New England highway numbering system but Connecticut still used it for several more years.
In 1932, the Highway Department decided to abandon the New England numbering system as well by completely reorganizing the state highway system.
The renumbering completely altered the previously existing state highway numbers.