[Slartibartfas]

The new ÖBB Nightjet train sets, or parts of it at least, are apparently already being tested in the wild.

Anyone knows why that carriage comes in red livery?

 

[mistertl]

That is one of the new generation Railjet coaches that is being tested as well. The lower door provides a barrier free access to the train.
News article and more pictures: [AT] multicolor test train: Nightjet/Railjet/Nightjet/Railjet is out [updated]