This was a project called “Revisions” curated by Peter Schulberg of Eco-Logical Art. Old billboard vinyl is recycled as a canvas for new artwork, then displayed on billboards in the city as a public art gallery. This billboard has been shown in Los Angeles and Oakland, CA. image size 10′ x 13′ on a 14′ x 48′ billboard.
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more info http://www.eco-logicalart.org