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Blue railway signals?
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December 13th 18, 06:40 PM posted to uk.d-i-y,uk.rec.cycling
Rod Speed
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Posts: 1,488
Blue railway signals?
Fred Johnson wrote
Can anybody else remember blue traffic lights on railways?
Can't find any evidence on google. I'm sure whereas cars
have red/amber/green, railways always had a 4th blue light.
What does it mean
https://en.wikipedia.org/wiki/Railwa...nal#Components
and why has it disappeared from Google?
It hasn't.
Rod Speed
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