Alstom to deliver additional trains for Hamburg U-Bahn, Germany January 8, 2016 | Europe Company News Hamburger Hochbahn AG (HHA), operator of the Hamburg U-Bahn, has exercised an option worth EUR100 million to procure 27 DT5 trains. The option is part of the framework contract signed in 2006. An init... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password