Also, an unnumbered road was established from Chatsworth to the Tennessee state line in Tennga. By the end of 1921, SR 4's eastern extension was built from Cartersville to Fairmount. Also, the segment of SR 2 between Calhoun and Ellijay was shifted southward, with it designated on the Fairmount–Chatsworth segment. By the end of 1926, SR 34 had been redesignated as a southern branch of SR 8. All of its length had a "sand clay or top soil" surface. SR 61 was designated on the previously unnumbered road north-northeast of Chatsworth. The southern half of the segment of SR 4 from Cartersville to Fairmount had a sand clay or top soil surface. The northern half of the segment of SR 2 from Fairmount to Chatsworth had a completed semi hard surface. Before the decade ended, US 78S was designated on the segment of SR 8 from northeast of Carrollton to Villa Rica. The segments of SR 4 from Cartersville to Fairmount, and SR 2 from Fairmount to Chatsworth, were redesignated as a southern extension of SR 61. At this time, the Chatsworth–Tennga segment was under construction. In 1930, the Cartersville–Rydal segment, as well as a small portion north of the Gordon–Murray county line, was under construction. The Rydal–Fairmount segment, as well as a small portion south-southeast of Chatsworth, had a completed semi hard surface. Later that year, a small portion of SR 8 southwest of Villa Rica, as well as a portion north of the Gordon–Murray county line, was under construction. The Cartersville–Rydal segment had a sand clay or top soil surface. Also, the Gordon County portion of the Fairmount–Chatsworth segment had completed grading, but no surface course. The next year, the segment of SR 8, from northeast of Carrollton to just southwest of Villa Rica, had a completed hard surface. The Cartersville–Rydal segment was under construction. A portion north of the Gordon–Murray county line had completed grading, but no surface course. The Chatsworth–Tennga segment had a sand clay or top soil surface. In January 1932, an unnumbered road was built between Villa Rica and Cartersville. In March of that year, SR 61 was designated on the previously unnumbered road from Dallas to Cartersville; however, there was no indication as to whether it was designated on the Villa Rica–Dallas segment.