Imagine this: just when you think that you'll manage to survive London traffic, you drive towards the Heron Quays roundabout. Instead of having to tackle one set of traffic lights, you are adressed to by a mere 75 of them. Just when you start to feel a bit scared, you realize it's a piece of art.
Traffic Light Tree was designed by the Parisian artist Pierre Vivant. When one of the three trees on the site was dying because of pollution by passing cars in 1998, he designed this set of traffic lights, mimicking a tree. But it's not just that, it's also a reflection of all the continuous rhythm of financial and commercial activities.
I found this one thanks to Citynoise.