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Coloured lights read by their angle.
Also known as: CPL signal, Pennsylvania position light
A North American signal carrying its meaning in both the colour of its lights and the angle at which they stand.
Carries its aspect in the angle of a pair of lit lamps as well as in their colour.
Contexts: Public information
Stays readable to a driver who cannot distinguish the colours, because the angle alone is sufficient, which was the explicit reason for the design.
Contexts: Public information
Pairs of lamps lit together on a vertical, horizontal or diagonal line, the line's angle carrying the aspect alongside the colour.