Autor: Richard Mayne
Título: Poster issued by the Metropolitan Police in 1868 announcing the first pedestrian crossing signal.
Data: 1868
Origem: "Making Roads Safe for Pedestrians or Keeping them Out of the Way? - an Historical Perspective on Pedestrian Policies in Britain", Muhammad M. Ishaque and Robert B. Noland, Imperial College London Centre for Transport Studies
Fonte: https://commons.wikimedia.org/wiki/File:Police_crossing_notice_1868.png
Licença: Domínio Público
