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23rd July 2008, 06:31 PM

On Tue, 22 Jul 2008 11:16:40 +0100, BH Williams wrote:

> TVM signals are carried by the track circuit, and give a maximum
> permitted speed, rather than being a repetition of signal aspects. These
> speed bands vary according to the type of train, gradient etc, and are
> not directly related to the location of the repere.

Thanks for your very detailed reply, none of this was explained in the
commercial DVD, as they were more focused on generalities and the view
from the Eurostar cab.

23rd July 2008, 06:31 PM	#8 (permalink)
Ar Guest Posts: n/a Classified Rating: % ()	CTRL Signs On Tue, 22 Jul 2008 11:16:40 +0100, BH Williams wrote: > TVM signals are carried by the track circuit, and give a maximum > permitted speed, rather than being a repetition of signal aspects. These > speed bands vary according to the type of train, gradient etc, and are > not directly related to the location of the repere. Thanks for your very detailed reply, none of this was explained in the commercial DVD, as they were more focused on generalities and the view from the Eurostar cab.