I've been building some jigs to make wooden billboards (more on this soon) but then I got sidetracked by a 1920s billboard painted on a wall. No, it's not just a wall sign, it has a painted frame to make it appear to be a freestanding billboard. It was so odd, I worked up a variation in GIMP to use on a future structure. Maybe I'll pop it onto the Merchantile or Smitty's Music Shop.

https://miniaturearchitect.blogspot.com/2018/10/a-billboard-thats-not-billboard.html

Clever!

If this link works, it shows a billboard mounted close to the ground and to a building. Note the spur ending about where the men are standing. To the right of the spur is a street, and to the right of that, not showing, is a through rail line. The building to the left is a steam laundry, and the building in the background is a dairy. The year is 1921.
https://catalog.aclib.us/search/searchresults.aspx?ctx=1.1033.0.0.6&type=Keyword&term=*auto%20accident&by=KW&sort=PD&limit=TOM=dmc&query=&page=0&searchid=2