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Old October 9th 09, 10:11 AM posted to uk.railway,uk.transport.london
Sam Wilson Sam Wilson is offline
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First recorded activity at LondonBanter: Aug 2003
Posts: 173
Default First train tested on East London Line

In article ,
rail wrote:

In message
D7666 wrote:

But we will see a green navigation light on the right wing won't we ?

Or will they make it blue ?


It's*only the yellow filter on the window that makes it appear green...


I note that railway practice includes putting a blue(ish) filter in
front of a yellow(ish) light to make a green signal, but in general a
properly yellow filter in front of a properly blue light would appear
dark.

Sam