Stop! One of five panoramic images to be produced, each featuring a different type of traffic sign. The image becoming a warning, a visual metaphor, of our species’ effect on the life of our planet. 34×191 in. Stop! One of five panoramic images to be produced, each featuring a different type of traffic sign. The image becoming a warning, a visual metaphor, of our species’ effect on the life of our planet. 34×191 in.