Presumably because White is a bit more visible? I think (but might be wrong) some designs have the central portion with green lights.I have always been a bit puzzled as to why they are white and not green.
Contrast and Visibility would be my guessI have always been a bit puzzled as to why they are white and not green.
Giving a green would be akin to giving right away! The white bat is the equivalent of the dispatcher giving a white light. Modern ones do also have a red/green function to either give a stop handsignal or relay a green handsignal from the guard to the driver.I have always been a bit puzzled as to why they are white and not green.
There are LED ones now, all Avanti stations other than Euston have them now following a trialI have always been a bit puzzled as to why they are white and not green.
It’s black so only the person the handsignal is intended for sees a white side.I got told years ago that the "other" side (ie. The side that isn't being shown to the conductor/driver/other dispatcher) was black as opposed to any other colour as it doesn't reflect light.
Is there any truth in that or something someone just made up!