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Yellow Peril

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K.o.R

K.o.R

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6 Dec 2017
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Supercoss said:
When the idea of ‘ 3 state’ banner repeaters was first mooted the vertical line was to be the 3rd state
1 horizontal ‘on’ danger aspect ahead
2 45 degrees ‘off’ yellow or double yellow aspect ahead

3 vertical off signal green aspect ahead
The vertical line was not used instead green backlit option chosen
‘Screw head’ Symbol used on ID plates


View attachment 60442
Click to expand...

Sort-of similar to tram signals, and also the Northeast Corridor in the US which uses a colour-and-direction style signal system.
 
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