I-75 then runs concurrently with I-85 due north over the Downtown Connector through the central business district of Atlanta. The two Interstates intersect I-20 in downtown. Several miles north of the I-20 interchange, the two Interstates split, I-75 heads in a general northwest direction while I-85 heads northeast, crossing outside the I-285 Perimeter and heading toward the major suburban city of Marietta.
I-75 and I-85 converge in Atlanta's downtown area via the Downtown Connector. The two highways then diverge north of their intersection with I-20, with I-75 generally moving northwest and I-85 heading northeast, bypassing the I-285 Perimeter to reach Marietta.