Comprised of four arches, with one measuring eighteen metres and three other smaller ones, the Tram bridge crosses the Volferine river near the new Pont d’Enfer (Hell’s bridge). On the old tram line that linked Bellegarde-sur-Valserine to Chézery-Forens, it is one of the three bridges built for the tramway’s passage after that of Bellegarde and the Pont du Moulin des Pierres, which overlooks the gorges from 65 metres high with a range of 80 metres.