[quote="N464"][quote="gallop3"]Ray is right .and Chris is right too.
The repeater is the only signal where you will get this aspect.
The only possible difference would be very hypothetical as it would involve
a distant signal with a co-acting arm with a broken wire on the bottom arm.Possible but an irregularity.
A repeater signal can indicate lot's of things, usually a distant signal or to indicate going from 3position to 2 position area.
Also used on western line crossing loops to repeat either signal or point detection.
I suggest again that you grab a vr blue book (r&r) and a general appendix and do a bit of reading.
Of course in nsw the green over yellow is used on home signals.[/quote]
Ray is not quite right, If this signal is at yellow over yellow then the next signal is at STOP. Green over yellow indicates that the next signal is showing a PROCEED aspect. This signal does not tell the driver what speed he can do, and if the aspect is yellow over yellow it does not tell the driver that the track section ahead is clear. I am not sure if green over yellow tells the driver that the track section ahead is clear, I have not seen if the signal drops back to yellow over yellow when a train passes it.[/quote]
In two position signalling areas the next signal can't be at STOP!
In three position area the next signal can be at stop like those on the Western line to Ballarat.
On the CTC they were converted to automatics. Repeaters are light signals and are indicated on diagrams with fishtails arms in circles
post two at broadford shows it.
When Horsham had it's panel put in the late 70's and converted to three position signalling there was a repeater at either end. The old up repeater which is now an automatic can be seen from the Western highway at Dahlen.