Georgia State Route 5
Between August 1950 and the beginning of 1952, the entire Powder Springs–Marietta segment had a completed hard surface. A portion north-northeast of McWhorter had a sand clay or top soil surface. In 1953, the northern two-thirds of the McWhorter–Douglasville segment was hard surfaced. A portion east of Roopville had a sand clay or top soil surface. Three segments had completed grading, but was not surfaced: from the Alabama state line to Roopville, the Carroll County portion of the Whitesburg–McWhorter segment, and a portion north-northeast of McWhorter. Between June 1955 and July 1957, a portion east of Roopville had completed grading, but was not surfaced. Between July 1957 and June 1960, three segments were paved: the central portion of the Bucktown–Roopville segment, the western half of the Roopville–Whitesburg segment, and from southwest of Whitesburg to north-northeast of McWhorter. By June 1963, the segment from west-northwest of Tyus to Roopville was paved. By the end of 1965, the segment from the Alabama to east-southeast of Lowell was hard surfaced. The segment from east-southeast of Lowell to south-southwest of Whitesburg had a "topsoil or gravel" surface. At this time, SR 5 Byp. was built and hard surfaced from US 76/SR 5 southwest of Blue Ridge to SR 5 north of the city. In 1966, SR 5 was hard surfaced from Alabama to Douglasville. In 1973, SR 705 was proposed from SR 3 (Church Street) in Marietta to SR 5 south of Blackwell, with an interchange with I-75. In 1977, I-575/SR 713 was proposed from I-75 north of Marietta to just south of the Cherokee–Pickens county line. It was completed from SR 140 south of Canton to SR 20 east of the city. The next year, the entire Cobb County portion (except for the southern end) of I-575/SR 713 was under construction. SR 5 through Blue Ridge was shifted westward, replacing the entire length of SR 5 Byp. Its former path through the city was redesignated as SR 5 Bus. By the end of the decade, SR 733 was proposed between two intersections with US 76/SR 5 northeast of Ellijay. At this time, SR 734 was proposed from US 76/SR 5 south-southwest of Cherry Log, across US 76/SR 5 north-northeast of Cherry Log, and then to another intersection with US 76/SR 5 in Lucius.
Georgia State Route 20
By the middle of 1930, SR 20 was established from SR 61 in Rydal to SR 5 in Canton. The entire Rome–Cartersville and Buford–Lawrenceville segments had a completed hard surface. Also, SR 53 was designated from the Alabama state line to Rome, farther to the north than SR 20. Later that year, the portion of SR 20 and SR 53 west of Rome were swapped. By the beginning of 1932, US 19 was shifted farther to the west and off of the current SR 20 between Buford and Lawrenceville; at the same time, US 23 was designated on this same segment. In January 1932, SR 20 was established from Canton to Cumming. SR 68, from Cumming to Buford, was decommissioned and redesignated as part of SR 20. Also, since SR 13 was shifted to a more western alignment, its segment from Buford to Lawrenceville was also redesignated as part of SR 20. A few months later, SR 20 was established from Loganville to Conyers. Nearly a year later, SR 20 was established from Conyers to McDonough. The next month, the western part of the segment from the Alabama state line to Rome was under construction. Later that year, SR 20 was designated along SR 61 from Cartersville to Rydal, with the entire length having a sand clay or top soil surface. Also, a portion of the highway east of Canton was under construction. Before the year ended, US 41W between Rome and Cartersville was redesignated as part of US 411, which was also designated along SR 20/SR 61 from Cartersville to Rydal. At this time, the Rockdale County portion of the segment between Loganville and Conyers was under construction. By the middle of 1935, the western half of the Canton–Cumming segment was under construction. By October of that year, a small portion east of Canton had a sand clay or top soil surface. At the end of the year, a small portion north-northeast of Cartersville, as well as a small portion north-northeast of Conyers, had a completed hard surface. Later in 1936, the central portion of the SR 20/SR 61 segment, from Cartersville to Rydal, had completed grading, but was not surfaced. A few months later, a small portion south-southwest of Rydal had a completed hard surface. The entire Forsyth County portion of the Canton–Cumming segment, except for the eastern end, was under construction. Also, the entire Gwinnett County portion of the Cumming–Buford segment had completed grading, but was not surfaced. By the middle of the year, the central portion of SR 20/SR 61, from Cartersville to Rydal, had a completed hard surface. Also, the eastern three-fourths of the Canton–Cumming segment was under construction. A few months later, the western third of this segment had a completed hard surface, while the eastern third of it had completed grading, but was not surfaced. The northern half of the segment between Lawrenceville and Loganville, and nearly the entire northern half of the segment between Conyers and McDonough, also had completed grading, but was not surfaced. About two years later, US 23 was shifted farther to the west and off of SR 20's path. Also, a small portion northeast of Buford had a sand clay or top soil surface. Before the year ended, about half of the total length of the segment from the Alabama state line and Rome had a completed hard surface.