Arco is a commercial passenger train service operated in Spain by Renfe Operadora. Arco fully renovates and refurbishes Renfe's B11x-10200 series of passenger trains. New bogies, capable of working at 220 km/h, were added. The bogies are modified versions of model GC-1 by CAF, also known as GC-3, allowing a higher degree of comfort at higher speeds.
The Arco passenger trains work on the line Barcelona – Malaga – Sevilla – Badajoz – Almería- Granada, with the train known as Arco García Lorca; and since 5 May 2008, they also cover the line Basque Country – Galicia, known as Arco Camino de Santiago.
Until 2 May 2008, the trains were operating on the Mediterranean corridor, between Barcelona, Alicante and Murcia. There was also an Arco train service from Porbou / Cerbere (France) and Valencia Nord.
- Operated lines: Mediterranean Corridor Levante, Basque Country-Galicia
- Manufacturers: Renfe, CAF
- Units manufactured: 41
- Year established: 1999
- Top speed: 220 km/h
- Commercial Speed: 200 km/h
- Beam heating: Yes, 3 kV (CC)
- Gauge: 1,668 mm