The sign in the image indicates that:

A)The mandatory carriageway for two-wheeled motorcycles begins.
B)Two-wheeled motorcycles are prohibited from travelling.
C)End of mandatory carriageway for two-wheeled motorcycles and assimilated three-wheeled vehicles.Correct
Sign R-508, "End of mandatory carriageway for two-wheeled motorcycles", indicates the end of the mandatory carriageway for two-wheeled motorcycles and three-wheeled vehicles assimilated to motorcycles.