Construction
The first lines built, linking Caen with the coast used 15 kg/m rails. The loading gauge allowed a width of 1.88 metres (6 ft 2 in) and height of 2.80 metres (9 ft 2 in). Gradients were to be no steeper than 30mm/m (1 in 33). Trains were to be restricted to 20 kilometres per hour (12 mph) with a maximum length of 60 metres (200 ft). Later lines were built with rails of 18 or 20 kg/m and the earlier lines were upgraded in the 1930s. Many of the lines were laid alongside roads or canals.
Read more about this topic: Chemins De Fer Du Calvados
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