Arc de Triomf is a Rodalies de Catalunya and Barcelona Metro interchange complex. It is named after the adjacent triumphal arch of the same name near which it is situated, in the Barcelona district of Eixample in Catalonia, Spain. The Rodalies station is served by Barcelona commuter rail service lines R1, R3 and R4, as well as Girona commuter rail service line RG1 and regional line R12. The Barcelona Metro station is served by TMB-operated line L1.

Line 1, shortened to L1, coloured red and often simply called Línia vermella, is the second oldest Barcelona Metro line, after line L3. It is the longest line of the Barcelona Metro, and links L'Hospitalet de Llobregat and Santa Coloma de Gramenet. Originally operated by the independent Ferrocarril Metropolitano Transversal de Barcelona, it is today operated by Transports Metropolitans de Barcelona (TMB) and is part of the ATM fare-integrated main transport system. L1 is the only metro line in Spain to use Iberian gauge tracks, as used by most Spanish main line railways.