 Steam locomotives equipped with a gear wheel were used.In 1937 the FS ALn 56 railcar, expressly designed for the cogwheel line, made it possible to reduce the travel of passenger trains to 90 minutes.However, already by the end of the 1930s the troublesome maintenance problems and the excessive travel time pushed the FS to design a new line, however the start of construction for the new track was delayed, in part by the Second World War.