On September 17, 1923, the section from Estelline to Turkey was cancelled, as SH 18 extended northeast from Turkey to Memphis. By 1929, it was shortened to Bovina, as it was constructed on that route, instead.
On September 17, 1923, the section from Estelline to Turkey ceased operations when SH 18 extended northeast from Turkey to Memphis. By 1929, this segment was reduced to Bovina, as it had been built on that route.