THE SOFTWARE HORROR PICTURE SHOW
Railway Signal Box Failure in Hamburg-Altona, 1995

The introduction of a fully electronic signal tower for German railway in Hamburg Altona on March 12, 1995 resulted in some substantial problems.


Several Sources:

www.informatik.hu-berlin.de/~roch/Studium/vnode2.html
www.tu-harburg.de/tbg/Deutsch/Diplom-Diss/diplom-hinck.html
www.infosec.ch/faelle/f_fall177.htm
Hennes-Altona-Ausarbeitung-16-12-02.pdf