Actually, the Berlin street signs are well-known cases of using the alternate form of the German sharp s. I personally have never seen a straight y in German usage anywhere else. For me, both cases can sufficiently being taken care of using OpenType features or simply a dedicated font, as is the case with the lettering in Berlin.
The German Wikipedia article on the „ß“ (https://de.wikipedia.org/wiki/ß) names the author of the font (Herbert Thannhäuser); in the English version on the letter, this information is missing. The article dedicated to Herbert Thannhäuser personally (https://de.wikipedia.org/wiki/Herbert_Thannhaeuser; German Wikipedia only) makes it clear that the font used in Berlin was especially commissioned from him, so it was probably more a one-off design. Am 06.04.2017 um 15:26 schrieb Michael Everson <ever...@evertype.com>: > > http://evertype.com/standards/unicode-list/seydlitzstr.jpg > > Do you think we should encode a Latin straight y (like the Cyrillic one) so > we can write Seүdlitzstraſʒe? > >> >> Would it make sense to propose standardized variation sequences for these >> styles or should this be left to font features like `cv##` or `calt` in >> Opentype? > ++++++++++++++++ Sebastian Kempgen MacCampus® Germany