StratFord Central Line signal

Why does the signal at the country end of the down Central Line at Stratford
have Red, WHITE and Green aspects? It wasn't just a faded yellow!

MaxB

kevallsop@holdthefrontpage.co.uk wrote:
> It wasn't appropriate to use yellow, as on traditional signalling
> systems that would indicate to the driver that he was clear to the next
> signal.

They should have chosen something other than white though. If theres
any colour that could be confused at a distance with lots of other
normal
lights nearby its a white. What was wrong with blue or purple for
example?

B2003

Boltar wrote:

> kevallsop@holdthefrontpage.co.uk wrote:
> > It wasn't appropriate to use yellow, as on traditional signalling
> > systems that would indicate to the driver that he was clear to the next
> > signal.
>
> They should have chosen something other than white though. If theres
> any colour that could be confused at a distance with lots of other
> normal
> lights nearby its a white. What was wrong with blue or purple for
> example?

Nothing. In fac rumour has it that the white aspects are going to be
replaced with blue aspects, to match the blue aspects to be used on the
VLU signalling.

TheOneKEA wrote:
> Boltar wrote:
>
>> kevallsop@holdthefrontpage.co.uk wrote:
>>> It wasn't appropriate to use yellow, as on traditional signalling
>>> systems that would indicate to the driver that he was clear to the
>>> next signal.
>>
>> They should have chosen something other than white though. If theres
>> any colour that could be confused at a distance with lots of other
>> normal lights nearby its a white.

One would have thought so, but I think you'll find that white signals are
already used on tram systems, e.g. Croydon and Bordeaux to my knowledge.
Presumably the potential confusion has been investigated and found to be not
a problem in practice.

>> What was wrong with blue or purple
>> for example?
>
> Nothing. In fac rumour has it that the white aspects are going to be
> replaced with blue aspects, to match the blue aspects to be used on
> the VLU signalling.

VLU?

--
Richard J.
(to email me, swap 'uk' and 'yon' in address)

On Thu, 16 Nov 2006 21:17:59 +0000, Paul Corfield
<aooy65@dsl.pipex.com> wrote:

>I don't know if we have an "official" abbreviation for the Sub Surface
>upgrade - haven't heard one yet.

WHFO?

In message <455da386$0$8729$ed2619ec@ptn-nntp-reader02.plus.net>, MaxB
<max@thebattens.me.uk> writes

>>>BTW - did you know that the original signal aspects on main line railways
>>>were white for clear and red for stop or caution (distants were not well
>>>differentiated in the early days). I do not know when the green aspect
>>>became the standard, but suspect that it was in the early years of the
>>>twentieth century as electric lighting external to the railway became
>>>common.
>>
>> Green used to be the caution aspect:
>>
>> White is right and red is wrong.
>> Green means gently go along.
>>
>> My memory says it was around WW1 that the caution aspect moved to yellow,
>> allowing green to mean clear.
>>
>> On the big railway, shunters' handlamps show white for go and green for
>> slow down.
>>
>
>And of course "Feathers" are white too!

We don't have feathers on the Underground.... we have arbour lights.
--
Steve Fitzgerald has now left the building.
You will find him in London's Docklands, E16, UK
(please use the reply to address for email)

"Steve Fitzgerald" <junk@[127.0.0.1]> wrote in message
news:h5lKq4A1kmXFFAAc@g7kkh....
> In message <455da386$0$8729$ed2619ec@ptn-nntp-reader02.plus.net>, MaxB
> <max@thebattens.me.uk> writes
>
>>>>BTW - did you know that the original signal aspects on main line
>>>>railways
>>>>were white for clear and red for stop or caution (distants were not well
>>>>differentiated in the early days). I do not know when the green aspect
>>>>became the standard, but suspect that it was in the early years of the
>>>>twentieth century as electric lighting external to the railway became
>>>>common.
>>>
>>> Green used to be the caution aspect:
>>>
>>> White is right and red is wrong.
>>> Green means gently go along.
>>>
>>> My memory says it was around WW1 that the caution aspect moved to
>>> yellow,
>>> allowing green to mean clear.
>>>
>>> On the big railway, shunters' handlamps show white for go and green for
>>> slow down.
>>>
>>
>>And of course "Feathers" are white too!
>
> We don't have feathers on the Underground.... we have arbour lights.
> --
> Steve Fitzgerald has now left the building.
> You will find him in London's Docklands, E16, UK
> (please use the reply to address for email)

Well, they sound very pretty too!

MaxB

I remember at conversation like this at the RTC in the 1970s ("Railway
Training Centre", before anyone asks...)....someone suggested using a
black light.....