There are three objects in this picture.
Three characters in the play. There are no humans. They are in the background out of sight.
The three parts have equal value. If it was music and the the three parts instruments, it would be a trio, probably a jazz trio, but not necessarily. Let’s not be distracted by the saxophone!
This is an unusual dialogue. These objects do not normally share a conversation. They normally exist in separate universes. We can see the plant for example but we do not grasp how it feels, or is, in this life.
The sign just keeps pointing and promising over and over. All it can do otherwise is fade, or be run over.
The truck with the door open, is the drummer, the domineering background that keeps a lid on chaos. The truck imagines it to be in control of the wheel affair.
The picture can tell a story. We can imagine the tales spun by each voice to make the story click.
It’s not that it’s a lonely place out there, on the road. It’s only that it’s unfamiliar and the relationships ungainly.
With three objects not moving, it’s a still life and by being still commands our attention so we can concentrate.