It isn't shut down - atleast not if you mean permanently. It is closed at night time, and was also pretty much completely shut down after the 7/7 attacks, but it is still running good. Infact, they are introducing two train types at the moment - one for the Victoria line (light blue on the map), and one for the Metropolitan line (the purple one).
off line shering
If by "shut down" you mean "die," then yes.
if by shut down you mean remotely disable the ignition, then no. they can however shut it down by issuing a reposession order.
You just shut down computer
ASD means auto shut down
Nickelodeon has not shut down.
quizilla.com has not shut down.
what can be reignited after they are shut down.
Auto shut down
No. It has never shut down, and probably never will shut down.
no answers.com is not being shut down.