Re: Simple Question.....

["tezza" <tezza@atinet.com.au>]

David Proctor wrote in message <01bd15bb$406b8da0$0e4a23cb@locxvcym>...
>Simple really - although complicated if you do not know (I presume you are
>talking about NSW safeworking here)
>
>The top light is the authority to enter the next section - Red = stop,
>Yellow = turnout, Green = go

*Yellow does not always mean turnout, it may mean that there is a signal at
stop within breaking distance.

>The bottom light gives an indication of the signals in advance.
>Thus, 2 Reds indicates stop, this will be preceded by a Green over Red,

*or yellow over red

>which will be preceded by a Green over Yellow,

*or 2 yellows or 2 greens

> which will be preceded by a
>Green over Green - thus, a driver will get at least two signals advance
>warning of a signal being at stop.

*Incorrect, a Driver may only get one signal's warning in advance of a
signal
being at stop. i.e. 2 greens, green over red, 2 reds.

>There are variations on this, with some other peculiarities thrown in,
>(such as Close-Up and low-speed signals) but the principle is basically the
>same.
>
>Hope the above is of assistance.
>David Proctor
>daproc@bigfoot.com
>
>David Bradshaw <dab@sydney.dialix.com.au> wrote in article
><883539593.340513@fermi.dialix.com.au>...
>> Just a simple question from an inquisitive commuter:
>>
>> Often I see two sets of lights one atop the other (ie on the same post).
>> I gather (correct me if I'm wrong here) that red = stop; amber=proceed
>> with caution; green = proceed, though I am a bit lost as to the role of
>> the dual signals!!
>>
>> David Bradshaw
>>
>>