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The Tua line was in operation for more than 120 years in the case of the section between Foz-Tua and Mirandela and for just under 90 in the section from Mirandela to Bragança. The operation of this railway was marked by several alterations and changes, in terms of rolling stock, fixed installations and even management itself – in the mid-20th century the line ceased to be managed by the National Company and passed into the hands of from CP. Its impact was also remarkable, at an economic, demographic, urbanistic, landscape and cultural level.

Despite all of this, the Tua line fell into decay as a result of its own characteristics, the lack of investment and, above all, the evolution of the road mobility system in the region. The most immediate and resounding consequence was the closure of the Bragança line in 1992. In 2008, after several accidents on the road, the operation was reduced to the stations around Mirandela, operated by the local subway service, promoted by the municipality of Mirandela.

In the meantime, there were expectations of another connection to the national rail network, the connection from Foz-Tua to Viseu, which was even designed and awarded in the thirties of the 20th century, but which never got to be built, failing a systemic opportunity which perhaps could have had an impact on the regional geography of Beiras and Trás-os-Montes.