London's Jubilee line extension had platform doors since it was opened in December 1999, but the upgrade to automatic train operation wasn't completed until 201

London's Jubilee line extension had platform doors since it was opened in December 1999, but the upgrade to automatic train operation wasn't completed until 2011. So for a long time, drivers had to manually stop the train at alignment points. This did cause occasional delays and problems, but it wasn't unworkable. As a passenger you did sometimes notice that the train doors weren't aligned perfectly with the platform doors. Now days, of course, it stops perfectly every time.