four different white signs that read five ten fifteen and twenty feet on them.
White signs show number of feet such as 20 feet, then 15 feet, etc.
White sign which says 20 feet away in black letters.
Signs are placed on a sidewalk that say 20 Feet, 15 Feet, and 10 Feet.
A black and white sign that reads "20 Feet" is positioned outside of a building.