Hamburg U-Bahn Type DT5

The Type DT5 is an electric multiple unit that Hamburger Hochbahn AG operates on the Hamburg U-Bahn. It is the first rolling stock on that system with air conditioning and with open gangways between the individual cars, so passengers can walk through the whole train. Each train is three permanently coupled cars, built as an articulated set in which the two end cars each ride on a single bogie and the centre car on two, and up to three units can run coupled together. The bodies are stainless steel, the trains use three-phase motors, and aluminium brake discs save weight but squeal loudly when braking. The interior has red upholstered seating, spaces for wheelchairs and prams, displays showing the next four stations and closed-circuit cameras. A European Union wide tender began in 2005 and the trains were ordered in December 2006 from a consortium of Alstom and Bombardier for 240 million euros. The first unit reached the Barmbek depot on 1 December 2011 and 163 trains were built in total.