This is an art project by Stephen Whisler; there are pictures of him installing them here: http://stephenwhisler.net/Sculpture/Pages/Speed_Enforced_by_Drones.ht

This is an art project by Stephen Whisler; there are pictures of him installing them here: http://stephenwhisler.net/Sculpture/Pages/Speed_Enforced_by_Drones.html http://stephenwhisler.net/Sculpture/Pages/Speed_Enforced_by_...