Le Day Viaduct, Railway bridge in Vallorbe, Switzerland.
Le Day Viaduct is a railway bridge crossing the Orbe River near Vallorbe, standing 65 meters high. The structure features a main arch spanning 44 meters and continues to carry regular train traffic today.
The viaduct was built in 1870 by the Jougne-Eclépens Railway as a connection between regions. Between 1923 and 1925, it underwent major reconstruction in which the original iron framework was replaced with stone arches to handle heavier trains and electrical systems.
The viaduct forms part of the rail connection between Paris and Lausanne, linking Switzerland to France through TGV Lyria services.
The viaduct can be viewed from the nearby footpath that runs along the railway line and offers good vantage points. A convenient visit is possible by exploring the walking routes in the surrounding area, particularly from the river banks.
What makes this bridge remarkable is that its reconstruction in the 1920s never interrupted train service. The new design was planned so carefully that trains could continue running throughout the entire project while the old iron structure was gradually replaced.
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