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In London, when ever a tube breaks down, there seems to be a signal failure. what is a signal failuer?

If the trains have been running for such a long time, why do the signals keep breaking? If the system has no moving parts why does it break down?

2006-12-03 05:53:34 · 1 answers · asked by BobbyLZ 2 in Cars & Transportation ➔ Commuting

1 answers

It's all in the name of safety.

2006-12-04 03:36:06 · answer #1 · answered by imnotbtami 5 · 0⤊ 0⤋

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