redesignated as SR 9E. 1960s By 1967, SR 400 was proposed from central Atlanta to SR 9E's intersection with SR 53. Its path was planned to be just slightly to the east of both the route of US 19/SR 9 and SR 9E. Later that year, the I-285/SR 400 interchange was built, and SR 400 was under construction from I-285 to a point southeast of Roswell. The next year, SR 400 was under construction from southeast of Roswell to the Fulton–Forsyth county line. 1970s By 1971, SR 400 was open from I-285 to SR 120 in Alpharetta. The next year, it was under construction from SR 120 to SR 20 near Cumming. By 1975, it was open from SR 120 to SR 20 near Cumming and under construction from SR 20 to SR 306 near Coal Mountain. About two years later, SR 400 was open from SR 20 to SR 306 near Coal Mountain. Approximately three years later, it was under construction from the SR 9E/SR 53 intersection southeast of Dawsonville to SR 60 near Dahlonega. By 1982, US 19 was moved off SR 9 between I-285 in Sandy Springs and Dahlonega. It was moved onto SR 400 from I-285 to SR 369 southeast of Coal Mountain. Also, US 19 was routed north-northeast from this point, to travel on the route of SR 9E, which had been decommissioned, to SR 60 near Dahlonega. It traveled on SR 60 to that city. Due to the transport of moonshine from the mountains of North Georgia to Atlanta, SR 9 was called Thunder Highway or Thunder Road for its use by moonshiners heading to Atlanta. Major intersections Roswell connector route State Route 9 Connector (SR 9 Conn.) was a connector route for SR 9 that existed in Roswell. In 1970, it was established from SR 400 northwest to US 19/SR 9. In 1977, the eastern terminus of SR 140 in Roswell was shifted slightly to the northeast to end at US 19/SR 9's intersection with SR 9 Conn. In 1981, SR 140 was extended along the entire path of SR 9 Conn., replacing it. See also References External links 009 Transportation in Fulton County, Georgia Transportation in Forsyth County, Georgia Transportation in Dawson County, Georgia Transportation in Lumpkin County, Georgia Roads in Atlanta Sandy Springs, Georgia Roswell, Georgia Chattahoochee-Oconee National Forest U.S. Route 19