U-Bahn Berlin: Die neuen JK-Züge | 4K

They have been in passenger service for several months now: the new JK series underground trains. Following delays, they are now running through Berlin’s narrow-gauge network, marking the start of a comprehensive fleet renewal. The new trains from Stadler Rail bring many innovations – but are also causing debate, for example regarding doors or air conditioning. 💬 What are your thoughts on the JK series? Feel free to share them in the comments!