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Can you Typophiles recommend any valuable on-line resources and books on wayfinding, signage systems (municipal information systems in particular)?
So far I've found some websites dedicated to such systems like Bristol Legible City and similar.
I'd like, however, to go deeper in the problem and read more about technical aspects of signage. Like legibility of a sign/type in low light conditions, what is the relation of the size of a sign post to a human height, etc.
There are some books but would appreciate any recommendations on these.