During the 1950s a new standard gauge line was built that passed on the western side of The Dutchmans Stern, Mount Arden and Mount Eyre, from Stirling North to Brachina and then roughly following the original narrow gauge route through Leigh Creek and to Marree, thus bypassing Quorn. This bypass took away the last railway traffic through the Pichi Richi Pass, and the last major freight traffic through Quorn. The only services left operating through Quorn were freight between Peterborough and Hawker. As a result, Quorn's importance diminished and eventually in 1980s the railway was completely closed as the last freight was moved to road transport. One unusual aspect of the railway working from Peterborough to Quorn and then on to Hawker was the need for the engine to be turned and attached to the opposite end of the train when arriving at Quorn, as it was not a "through" station for the trip from Peterborough to Hawker.