Line D of the Lyon Metro is a metro line with automatic trains running on tires rather than on steelwheels (rubber tired metro line), running trains without a driver. It also known as MAGGALY (Métro Automatique à Grand Gabarit de l’Agglomération Lyonnaise). Line D commenced operation under human control on 4 September 1991, between Gorge-de-Loup and Grange-Blanche. It was extended to Gare de Vénissieux on 11 December 1992, at which time it switched to automatic (driverless) operation. On April 28, 1997, it was extended again to Gare de Vaise.
Being the deepest of the lines in Lyon, it was constructed mainly using boring machines and passes under both rivers, the Rhône and the Saône. At 12.5 kilometres (7.8 mi) long, and serving 15 stations, it is also the longest of the metro lines in Lyon.