The project cost the Berlin Transport Company (BVG) €1.9 million to revamp the old subway cars that will shuttle passengers along a 1.8-kilometer route between Berlin's Central Station and the Brandenburg Gate. Two more old-school cars will be renovated and placed on the U55 underground line as well.
It may seem like you stepped into a time-machine when you get onto the cars, as advertisements from the 1950s will still be on the walls and even the upholstery looks the same, although the trains have been upgraded with modern safety equipment.
The reason for the trains coming back isn't so people can experience a different era, but because Berlin's metro system has a serious train shortage. By reusing old trains on the U55 line, the BVG can transfer the newer trains to the U6 line that has been experiencing higher demand that requires newer and faster cars. Make sure you get to Berlin before 2020, as the trains are expected to be back in museums once the newer U5 line is connected with the U55 line.
H/T: Conde Nast Traveler
