The imagery is the visual language of the streets - traffic cones, signs, garbage, walls, curbs - the detritus of the urban environment, the whole making up a pattern of textures, colors and shapes.
More from the release, quoted above, shortly after it was released:
Look Down/Shoot Down refers to the process of photographing on the street, the literal act of looking and shooting. LD/SD is also the term for a modern fighter jet’s radar capabilities to acquire, lock on and destroy a target. The act of photographing can be thought of as “hunting” for images, and these images in particular are often shot looking down at the pavement or curb. The photographer’s eye is constantly acquiring and targeting new information.