Potatoes growing out of the ceiling in a tunnel. It's an ad by Lays: 'our potatoes are grown closer than you may think.' Could be an interesting street art concept, hanging growing stuff in subway tunnels etc.
This bit of public art blends nature with traffic in one confusing sculture. It s Pierre Vivant’s Traffic Light Tree. A giant sculpture of fully-functioning traffic lights in London. For some reason it s parked next to a roundabout near Canary Wharf.