I drive through this regularly: I-95 immediately south of the Beltway in Springfield, Virginia, has a total of 24 or 25 lanes across seven carriageways/flyovers. It's a rare situation where the southbound exit roadway* has more lanes (six, at its widest) than any of the carriageways for thru traffic.
*I say "exit roadway" rather than "C/D road" because it doesn't provide access to the southbound thru lanes–it's only for exiting traffic. Thus, the "C" part of "C/D" doesn't really fit and "D road" sounds to me like a very low-importance European road.