Installation
| Country/region | Notes |
|---|---|
| Portugal | REFER network. Adjusted from the original 1,664 mm (5 ft 5 1⁄2 in) in the 19th century. Other gauges used in Portugal: 2,140 mm (7 ft 1⁄4 in) or 2,134 mm (7 ft 0.0 in) (Azores), 1,435 mm (4 ft 8 1⁄2 in), 1,000 mm (3 ft 3 3⁄8 in), 900 mm (2 ft 11 7⁄16 in), and 600 mm (1 ft 11 5⁄8 in) |
| Spain | Adif-managed national railway network (except new high-speed railway lines). Although Lleida–La Pobla de Segur Line is both managed and operated by Ferrocarrils de la Generalitat de Catalunya (FGC), it was formerly part of the national railway network and was constructed to the 1,668 mm (5 ft 5 2⁄3 in) gauge. Barcelona Metro line 1 still uses the former 1,672 mm (5 ft 5 5⁄6 in) gauge. |
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