what French street signs meant

 https://www.flickr.com/photos/taffeta/albums/72157635401185030/with/9680215069

and see https://www.flickr.com/photos/taffeta/albums/72157629876714215/with/7103607709

1955 https://www.flickr.com/photos/taffeta/albums/72157623556488584/with/4406943647

https://www.flickr.com/photos/taffeta/5935333528/in/album-72157621063523905/