Re: It's still academic

["Ron BEST" <ronbest@bigpond.com>]

David & Jan Winter wrote in message <36d418b2.0@news.highway1.com.au>...
>
>Eddie Oliver wrote in message <36D37C7F.4132@efs.mq.edu.au>...
>>MattyQ wrote:
>>
>>> >What about Yellow over Yellow:
>>> >
>>> >NSW: - diverge, next sig at caution?
>>> >VIC: - 3 pos repeater, nest sig at stop
>>> >QLD: - next sig at Single yellow, dunno the proper name of the aspect
>>>Snip....

>FAIL SAFETY would be a consideration: if a green/yellow indication meant a
>more restrictive condition than green alone, and the yellow failed, an
>unsafe situation could emerge. Of course, driver route knowledge SHOULD be
>such that the absence of a 2nd aspect would cause the driver to assume a
>fault and move to the most cautious approach ... BUT ...
>
>DW
>
What about green over red and the red fails??? Or is the top green wired
"through" the bottom red? In which case, is the top green wired "through"
the bottom yellow?? (NSW I'm referring to)
Rgds

Ron BEST
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