Traditionally, the track gauge in Spain now managed by Adif, is 1,668 mm (5 ft 5+21⁄32 in), known as Iberian gauge. This gauge (originally 1,674mm but then reduced slightly to allow interoperability with Portugal) was decided upon by a Parliamentary committee, after a report known as the Informe Subercase (named for its principal author) in 1844.
Traditionally, the track gauge in Spain now managed by Adif, is 1,668 mm (5 ft 5+21⁄32 in), known as Iberian gauge. This gauge (originally 1,674mm but then reduced slightly to allow interoperability with Portugal) was decided upon by a Parliamentary committee, after a report known as the Informe Subercase (named for its principal author) in 1844.
Source: Wikipedia "Track gauge in Spain" · CC BY-SA 4.0
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