The Development of Railway Transport in Spain…

The Development of Railway Transport in Spain and Portugal

During the 19th century, railway transport was rapidly developed across Northern Europe, driven by economic expansion and landscapes well-suited to railway construction. In contrast, Spain’s mountainous terrain and economic difficulties delayed large-scale railway development, making it one of the last major European nations to build an extensive rail network.

The first railway line in the Iberian Peninsula, a short link between Barcelona and Mataró, opened in 1848. However, Spain’s first railway had actually been built earlier—in Cuba, then a Spanish colony. It was not until the 1850s, when new laws encouraged foreign investment, that railway construction began in earnest.

One of the most consequential decisions in Spain’s railway history was the adoption of a broad-gauge track of 1,672 millimeters (5 feet 5 13⁄16 inches), or six Castilian feet. The reasoning behind this choice remains debated:

• Some historians argue that it was influenced by Spain’s hostility toward France in the 1850s, with policymakers believing that an incompatible gauge would make French invasion more difficult.
• Others contend that the decision was based on geographical necessity, as Spain’s rugged terrain required larger, more powerful locomotives to navigate steep mountain passes.

This broad-gauge system also extended to Portugal, which adopted a similar but slightly different gauge of 1,664 millimeters (5 feet 5 1⁄2 inches), rounded to a Portuguese unit.

In 1955, Spain and Portugal standardized their railway systems, halving the eight-millimeter difference and officially defining their tracks as 1,668 millimeters (5 feet 5 21⁄32 inches)—a system now known as the Iberian gauge. Despite this standardization, the Iberian gauge remained incompatible with the standard gauge (1,435 mm) used across much of Europe, creating a legacy of logistical challenges that persisted into the 20th and 21st centuries.