The Basel -- Zurich portion was made weekdays - only in 1979 .
The Basel -- Zurich portion was dropped entirely in 1982 , making the Gottardo 's route once again Zurich -- Milano in both directions .
The Basel -- Zurich portion was made weekdays - only in 1979 and dropped entirely in 1982 , making the Gottardo 's route once again Zurich -- Milano in both directions .