Albulagliederzug. Set of coaches with Driving Trailer for Albula line services, introduced in 2015, the driving trailers are similar in style to the Allegra Abe 8/12s and Abe 4/16 units.
These sets are air-braked whereas the majority of RhB stock is vacuum-braked. Some Ge 4/4ii and Ge 4/4iii loco's as well as the Abe8/12 Allegra units are fitted with dual braking to work with these sets.