The railway station in Chauny is part of the Paris - St Quentin - Maubeuge line, and is well serviced by Corail and TER trains towards Paris, Compiègne and Saint Quentin.
Until 11 September 2009, only one regular passenger train per day in each direction used to pass over the viaduct - a Corail route from Clermont-Ferrand to Béziers.
In 1985, Z 7500, Z 9500 and Z 9600 railcars were introduced on the Lyon – Genève/Evian/Saint-Gervais services, then in 1987, the Class BB 25200 locomotives (made available by the introduction of BB 22200 locos) were used with push-pull Corail trains between Lyon and Geneva.