A single aspectA Colour Light Signal capable of displaying only one Aspect. This may be Red (fixed red) or Yellow (Fixed Distant Signal). More of a Main SignalA Colour Light Signal capable of displaying a Main Aspect or a Semaphore Distant or Stop Signal. More; or, a Position Light Junction IndicatorAn Indicator which displays the Route at a Signal by means of a line of white lights. More; or,
the character displayed by an Alphanumeric Route IndicatorA Route Indicator that conveys its information by illuminated alphanumeric characters. The indicators are designated ‘standard’ and ‘miniature’ as a ref... More; or, a single
Semaphore arm or disc; or, a single aspectA Colour Light Signal capable of displaying only one Aspect. This may be Red (fixed red) or Yellow (Fixed Distant Signal). More (lamp) of a Position Light
SignalA visual display device which conveys instructions or provides prior warning of instructions regarding the driver’s authority to proceed. More.