Re: Concord derailment

[billbolton.REMOVE-To-EMAIL@computer.org (Bill Bolton)]

On Thu, 11 Jun 1998 09:19:20 GMT, McFergus@my-dejanews.com wrote:

>The whole point of four aspect signalling AFAIK is that trains with greater
>braking capabilities only need to treat an advanced caution as
>just that, and - depending on signal spacing and line speed - not actually
>take real action until a caution signal.

Perhaps that's the "whole point" of BR's view of 4 aspect signalling,
but there are many other multi-aspect signalling schemes which have
differing and equally valid reasons for existence.

Cheers,

Bill

Bill Bolton                 billbolton@computer.org
Sydney, Australia