By 1961, the highway had been shifted westward, but a spur of the Gulf, Colorado and Santa Fe Railroad had been constructed along the approximate location of the highway's present route. On October 24, 1985, SH 168 was approved for designation by the Texas Transportation Commission (TTC), and on April 18, 1986 the highway was officially designated by the TxDOT's Administration Circle.
In 1961, the highway was moved westward, but a branch of the Gulf, Colorado and Santa Fe Railroad was built along its current route. In 1985, SH 168 was approved for designation by the Texas Transportation Commission (TTC), and in 1986, it was officially designated by the TxDOT's Administration Circle.