Bombardier Double-deck Coach

After World War II, these coaches were developed further by VEB Waggonbau Görlitz (formerly WUMAG) into double-deck trains of two to five articulated cars sharing bogies, known as "Doppelstock(glieder)züge" (de:Gliederzug (Schiene)).

These trainsets were used by Deutsche Reichsbahn (East Germany) as well as several other railways of the Eastern Bloc in large numbers (about 4000).

Two variants were built: All units were transferred to City Night Line of Deutsche Bahn in 2007 and then to ÖBB Nightjet in December 2016.

(later upgraded to 160) In 2008, Bombardier presented the "Dosto 2010" future family of double-deck trains for the German market.

[5] Israel Railways has also ordered 443 TWINDEXX Vario carriages between 2010 and 2019 to support its expanding rail network, the last of which was delivered in December 2021.

These delays have been attributed to the need to redesign the trains to properly comply with Swiss disability access legislation after a lawsuit was filed against Bombardier and SBB by two Swiss disability-rights organisations at the Federal Administrative Court of Switzerland in 2012, as well as problems with the composting toilet tanks[7][8] and the tilting mechanisms.

[10] The National Railway Company of Belgium (NMBS/SNCB) has similarly ordered TWINDEXX-derived intercity trains designated as M7 in 2018, constructed at the former BN factory at Bruges, which entered service in January 2020.