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Completion of London's Thameslink rail project delayed until
In message , at 09:30:44
on Sat, 25 Nov 2017, remarked: Littleport station crossing! With an underpass like at Ely! Don't mention Ely! (You'll annoy Basil). But the underpass is even lower. So a van like this probably too high: https://goo.gl/maps/3LiuoCLXQZm 2.51m at Littleport compared to 2.7m at Ely. That van would just about get under You reckon there's 20cm extra clearance here - really?? https://goo.gl/maps/hso9PDgdviT2 judging by the amount of clearance visible there. Although judging by what's on Google Streetview, their car probably couldn't get under it. The best I can find is that the streetview cameras are "at 8.2ft". It's not clear if that's the height of the lens, or perhaps the lenses are at 8ft and the top of the camera housing at 8.2ft. That's so close to 2.5m it's not obvious which measuring system they were designed for. But when this last came up I mentioned that same view above, which is pretty much along the line of the roof of the white van, so I'm inclined to think the 8.2ft/2.5m is the lens (despite being designed in imperial-measuring USA), and hence the top of the housing is more like 8.4ft = 2.6m -- Roland Perry |
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Completion of London's Thameslink rail project delayed until
In article , (Roland Perry)
wrote: In message , at 09:30:44 on Sat, 25 Nov 2017, remarked: Littleport station crossing! With an underpass like at Ely! Don't mention Ely! (You'll annoy Basil). But the underpass is even lower. So a van like this probably too high: https://goo.gl/maps/3LiuoCLXQZm 2.51m at Littleport compared to 2.7m at Ely. That van would just about get under You reckon there's 20cm extra clearance here - really?? https://goo.gl/maps/hso9PDgdviT2 I see now. I was going by the van body and reckoning that the view showed the minimum bridge height. I didn't notice the things on the roof, so no, there isn't another 19cm there. judging by the amount of clearance visible there. Although judging by what's on Google Streetview, their car probably couldn't get under it. The best I can find is that the streetview cameras are "at 8.2ft". It's not clear if that's the height of the lens, or perhaps the lenses are at 8ft and the top of the camera housing at 8.2ft. That's so close to 2.5m it's not obvious which measuring system they were designed for. But when this last came up I mentioned that same view above, which is pretty much along the line of the roof of the white van, so I'm inclined to think the 8.2ft/2.5m is the lens (despite being designed in imperial-measuring USA), and hence the top of the housing is more like 8.4ft = 2.6m 2.5m = 8'2½". It's the maximum width of buses (or was). I suppose the 2.51m on the sign would be 8'3", what the other sign on the bridge shows. -- Colin Rosenstiel |
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