German Sign No. 254: No bicyclists
Self-drawn using Inkscape and gedit
MarianSigler {bla}, Mediatus

Image taken from the de:Straßenverkehrs-Ordnung (German Road Regulations) as published by the de:Bundesministerium für Verkehr, Bau- und Wohnungswesen (German Federal Ministry of Traffic, Building and Housing) at [1].