Interstate 285 (I-285) is an auxiliary Interstate Highway encircling Atlanta, Georgia, for 63.98 miles (102.97 km). It connects the three major Interstate Highways to Atlanta: I-20, I-75, and I-85. Colloquially referred to as the Perimeter, it also carries unsigned State Route 407 (SR 407) and is signed as Atlanta Bypass on I-20, I-75, and I-85.
I-285 at the I-20 interchange east of Atlanta
Atlanta, Georgia, 1955 Yellow Book with I-285 route
In the US state of Georgia, Interstate 20 (I-20) travels from the Alabama state line to the Savannah River, which is the South Carolina state line. The highway enters the state near Tallapoosa. It travels through the Atlanta metropolitan area and exits the state in Augusta. The highway also travels through the cities of Bremen, Douglasville, Conyers, Covington, and Madison. I-20 has the unsigned state highway designation of State Route 402 (SR 402).
Although the designation does not appear on shields, Georgia DOT refers to the highway as SR 402
I-20 approaching the Downtown Connector (I-75/85)
I-20 passing through DeKalb County within the beltway
Interstate 20 west at Conyers