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| London Transport (uk.transport.london) Discussion of all forms of transport in London. |
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#5
March 1st 09, 08:00 PM
posted to uk.transport,uk.transport.london
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Streetlamps in Camden Town
Paul Terry wrote:
In message , MIG writes [ blue lights on street lamps] A wild guess: maybe it's to do with distinguishing between power off and the lamp failing? That's possible, but I posted here a long time ago about new street lamps on the South Circular that have a very distinct (and not at all feint) blue lens pointing upwards. This is very obvious from above, but can only be seen from ground level if standing a very long way from the lamp post concerned. If it is some sort of pilot lamp, it seems very badly positioned. I didn't receive any plausible replies when I posted about this, but I have seen it suggested that modern "cobra" street lamps are so well designed to prevent night-sky pollution, that they need an upward aspect in blue in order to delineate the location of major roads for aircraft that, due to failure of automatic systems, are having to rely on visual navigation at night. I have no idea whether this is true (despite quite a lot of fruitless research), but I have noticed that most of these upwardly-directed blue lights are on major trunk routes in the capital (specifically on TfL red routes). All of the new red-route lamposts around here also have two brackets, about two metres apart vertically, with eyes that seem to be designed to tie banners. No banner has ever appeared - if the only one that ever does is "London Olympics 2012", I shall be even more despondent about the hidden costs of "the games" - an awful lot of welded steel has gone into these appendages.  Possibly they're markers for police and other emergency helicopters? |
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