Abstract
In the Portuguese railway system, narrow-gauge lines were an important part of the network, accounting for a fifth of the extent and roughly a sixth of the traffic. Portuguese historiography about these railways focuses on partial aspects of their evolution and does not provide a general critical overview of their history. In this article, I propose the analysis of Portuguese narrow gauge as a Large Technological System connecting the Portuguese center(s) to its periphery(ies) in different stages of its evolution, from its implementation to its decline. Using available literature and unpublished statistical data of operation, I demonstrate how narrow gauge was unable to compete with automobility and ceased to be an alternative for long-distance transportation, but is resurfacing with different uses and goals.