San Roque-La Línea railway
36°10′31″N 5°21′33″W / 36.175256°N 5.359137°W
The San Roque-La Línea railway line is a railway line built by the Algeciras Gibraltar Railway Company, it connects La Línea de la Concepción to San Roque station, but that has never been used.
An 9 km extension from San Roque station to La Línea de la Concepción was laid in 1893 which was to form the San Roque-La Línea railway line, but this was stopped by the Spanish government, the line eventually being completed in the 1970s but no train has ever run on them.
In 2016 a plan was made to use trams on the rail lines already in place since 1970 using EU funds.
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Wikipedia