Because a green illuminated sign on a platform might be confused with a green handsignal?Why are these yellow? Wouldn’t it be better to standardise on green like everywhere else (except USA which is red for some strange reason)?
Also as it explains in the TfL spec some of them are switchable to different routes.the way out signs have to be back-illuminated. They also stand out prominently against all the other direction signs.
Just wondering if there was a newer updated TFL sign and colour manual (later than 2002 shown in link above). One that included the Overground and the soon-to-be Elizabeth line.
‘Emergency exit’ signs must be used only to indicate a designated safe exit. For most exits, standard ‘Way out’ signs must be used.
Only designated emergency exits (leading to a safe area) may be marked as such, and normal exits (generally leading to ticket halls) must be signed as ‘Way out’
as they are not deemed a guaranteed ‘safe’ exit.
This is outlined in regulation 4 (7) of the Fire Precautions (Sub-surface Railway Stations) Regulations 1989. One of the lessons learnt from the King’s Cross fire is that emergency exits must be separate routes leading to an independent safe area. Normal ‘Way out’ routes must not be signed as emergency exits.
Thank you for that. The document on the Elizabeth Line Idiom was what I was looking for.Not that I'm aware of, but the entire range of TfL design standards is available here