I like the walk-your-bike sign below, but can’t imagine that a bike rider would see it. The ergonomics are just not there. However, someone walking a dog would be aware of signs on the ground, as their eyes would be focused at that level, anxiously awaiting the business of their wards.
I cropped this photography to a square format from its original 35mm aspect ratio. The symmetry of the square is appealing. I found that this edit was necessary to show the iron embedded in the sidewalk and minimize the shadow of my camera on the upper right. I should have thought about this when I shot the picture.
The photo below combines the design of shadows cast from structures above, with patterns embedded in the pavement.
Its original format was also 35mm, but the square format suited the design.