1926 Arkansas state highway numbering
In 1926, Arkansas renumbered its highways into a more traditional format. The system to be replaced was established in 1924 as Arkansas' first comprehensive highway plan. Roads were designated as "primary federal aid roads", "secondary federal aid roads", or "connecting state roads". The Arkansas State Highway Commission implemented the system of United States Numbered Highways also around 1926, and thus Arkansas decided to number its highways instead of using the "letter-nn" format. This resulted in the first true numbering of state highways in Arkansas. Note that the numbers 61, 63, 64, 65, 67, 70, and 71 conflicted with U.S. Route designations, so there were no highways with these numbers, and no future highways could be numbered 165 or 167 as they conflicted with U.S. Route designations. The highest number was 115, reserving 116 and up for future use.
| 1924 designation | meaning |
| A1-A9 | Primary federal aid roads |
| B1-B43 | Secondary federal aid roads |
| C1-C46 | Connecting state roads |