On 31 Jul 2005 02:29:21 -0700, "Boltar"
wrote:

Certainly if (as is likely outside the UK) people are disciplined and
refrain from blocking sensors to hold doors open.

Easily solved - make the doors close harder as they do in some other
countries so if you block them it actually hurts. People would soon
refrain from doing it.

In an unsupervised, computer-controlled situation this would be
downright dangerous.

On the main line, where there is someone supervising door closure, the
doors do usually close quite harshly. Anyone who's tried to hold back
the doors of a Class 153 DMU[1], for example, will know this.

[1] I did this once to assist a guard in boarding, as the external
staff controls had for whatever reason failed. The sensible thing
might have been for me to hold the emergency release instead, but she
operated that and I held the door back once open. The force with
which it then attempted to close was rather surprising.

Neil

--
Neil Williams in Milton Keynes, UK
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