The CAF Mark 4 (or MK4 or MKIV) are railway carriages operated by Iarnród Éireann in Ireland on the InterCity[1] service from Dublin to Cork.

Iarnród Éireann opted to extend the service to an hourly clockface departure in order to increase growth on the line.

The DVT Features a Yellow front end to ensure visibility and has a compartment towards the rear to carry Mail and Luggage.

Citygold cars have ergonomic, electronically adjustable seats, multi-channel ear phone jack sockets and individual overhead lighting.

[1] Main features include: Key dimensions: Although capable of 200 km/h (125 mph) operation, this higher speed would require both track and signal system upgrades and the provision of a faster locomotive than the currently used 201 class.