The Finnish Heritage Agency has classified Salo railway station as a nationally significant built cultural environment.

[2] Along the 20th century, there were plans to turn Salo into a junction station, with a new railway line terminating either at Somero, Riihimäki or Vanjärvi at Vihti.

When the Porkkala Naval Base was leased to the Soviet Union in 1944, there were plans of a new railway line to be built from Huopalahti to Salo via Ojakkala station in Vihti.

[2] When Porkkala was returned to Finland in 1956, there was no longer a hasty demand for the Huopalahti–Salo-line, but the planning for another possible railway line to Salo via Lohja (the so-called Elsa-line) began in 1965.

The choice of Salo as the winner was based on increased sales (9% improvement over last year), quality of customer service, and cleanliness of the station.