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Colour Light Signals

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Rochester
Three-aspect signal ER5 at Rochester is fitted with small additional lights, known as pigs' ears, to the right of the main lenses to assist with close-up viewing. An 'alias' plate on the post displays the number "2005", which is used when setting up the Cab Secure Radio (CSR) at this signal. (Photo taken 17 May 2006)


Dalmarnock Road Tunnel
YF307 is a three-aspect automatic signal located inside Dalmarnock Road Tunnel on the Argyle Line in Glasgow. Since the signal is situated below drivers' eye level, the usual order of lenses in the head is reversed. Accordingly, the red aspect is at the top and the green aspect is at the bottom. (Photo taken 20 February 2013)


Harrogate
Ground mounted signal H26 at Harrogate shows a rare exception to the rule that the most restrictive aspect (in this case, red) should be positioned closest to drivers' eye level. (Photo taken 3 July 2010)


Chester
Three-aspect signal CR81 at Chester station is mounted at an angle underneath the canopy on Platform 3. (Photo taken 22 July 2010)


Colchester
Signal CO20 at Colchester is a three-aspect searchlight signal capable of displaying red, yellow or green aspects through a single aperture. As well as a position light signal mounted at an unusually low height, the signal is fitted with alphanumeric route indicators and a "CD"/"RA" indicator. (Photo taken 16 May 2006)