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 6
SR 6 was established at least as early as 1919 from SR 1 in Cedartown east-southeast through Dallas to SR 8 in Austell. By the end of September 1921, it was extended westward to the Alabama state line. By October 1926, US 78 was designated on SR 8 at SR 6's eastern terminus. About 20 years later, between the beginning of 1945 and November 1946, the entire segment from Alabama to Austell was hard surfaced. Between June 1954 and June 1955, US 278 was designated on the entire original segment. Between June 1963 and the end of 1965, SR 6 was extended south-southwest on US 78/SR 8 to a point south-southwest of Austell and then on a sole path southeast to I-20; this entire extension was hard surfaced. At this time, Camp Creek Parkway was established from Welcome All Road west-southwest of College Park to US 29/SR 14 in the city. Between the beginning of 1963 and the beginning of 1969, a northern bypass of the main part of Rockmart was built from US 278/SR 6 west-northwest of the city to SR 113 in the northwestern part of the city. By the beginning of 1974, an eastern bypass of the main part of Rockmart was proposed from US 278/SR 6/SR 100 southeast of Van Wert north-northwest and north to SR 113 in the northwest part of Rockmart. In 1976, SR 139 was rerouted westward just west of the Atlanta Airport, onto the path of US 29/SR 14. Due to this, Camp Creek Parkway was extended eastward to I-85. Between the beginning of 1979 and March 1980, Camp Creek Parkway was extended westward to Old Fairburn Road and northwest to Butner Road. Between the beginning of 1979 and the beginning of 1982, SR 6's path in Cedartown was shifted westward one block, replacing the entire length of SR 6 Loop. In 1983, a western bypass of Powder Springs, Clarkdale, and Austell, designated as SR 726, was proposed from an unnumbered road south-southwest of Powder Springs to US 78/SR 5/SR 8 southwest of Austell.