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Touristic signage on German Autobahns: Perception and reception of touristic roadside signage. Study published by Harz University in 2020

Zeichen 386 Touristischer Hinweis ("Sign 386 - Tourist Information") - Tourist signs in the German Road Traffic Act)

Die braun-weißen Hinweisschilder an der Autobahn kennt jeder - ihre Schöpfer nicht ("Everyone Knows The Brown and White Signs on the Autobahn...") at www.leo.tu-chemnitz.de

Tourist Signs in Great Britain