The section between Genoa and Novi Ligure over the Giovi Pass used by both the Turin-Genoa and the Milan-Genoa lines, however, was extremely difficult and therefore a new link between Arquata Scrivia and Tortona was built which was opened on 1 October 1916, completing the current form of the line, except for improvements made in Genoa and the deviation opened in 2007 between Milan Rogoredo and Locate Triulzi replacing the 1862 route.