When the new SR 46 was created on 1 October 1926, it was described as follows: “State Road 46 – Spencer to Lawrenceburg by way of Bloomington, Nashville, Columbus, Greensburg, Batesville, Penntown and Greendale. (The Spencer-Columbus section is now a part of State Road 26. The Columbus-Greensburg section is new road. The Greesnburg to Lawrenceburg part is now State Road 53.)
The section listed as “new road” were listed on the Indiana Official State Highway Map for the Great Renumbering as an authorized addition…so it would not be part of the SR 46 route until after the Great Renumbering.