Originally, Loughor was the first station westwards from Landore; Cockett and Gowerton were opened at later dates.
The Loughor viaduct was constructed to carry the broad gauge South Wales Railway west of Swansea to Carmarthen.
The viaduct was rebuilt several times; modifications made include the removal of its swing bridge and broad gauge tracks, replacement of the timber deck with an iron structure, and additional piles.
In 1986, due to structural concerns, the track was singled and speed restrictions were imposed adding to journey times.
It is surmised that the train was travelling up to 60 mph to make up time, and jumped the straight track to the west of the Loughor River.