The Unidad Ejecutora del Plan Ferroviario Provincial (UEPFP) (in English: "Executive Unit of the Provincial Railway Plan"), mostly known under its trade name Ferrobaires, was a public railway company which operated extensive long-distance passenger trains throughout the Buenos Aires Province in Argentina. The company was primarily owned and funded by the Buenos Aires provincial government led by Eduardo Duhalde. The name "Ferrobaires" is a combination of the Spanish words for "Rail Buenos Aires."

Constitución railway station is a large railway station in Constitución, a barrio in central Buenos Aires, Argentina. The full official name of the station is Estación Plaza Constitution reflecting the fact that the station is located opposite Constitution Square, two kilometers to the south of the Obelisco landmark. The ground floor of the station has fourteen tracks and the floor below has two tracks for the Buenos Aires Underground.