During the day, the parking lots under Interstate 35 in downtown Austin are nothing special, although drivers might notice the metal poles that arc up from the highway. At night, however, they come alive with color-changing-programmed LED lights that illuminate and decorate the blocks between Fifth and Eighth streets. The light show was commissioned by the city's Art in Public Places program as part of a scheme to both beautify the lots and to make them safer for night-time parking. Locals nicknamed them "Brontosaurus Ribs" at first, but they add whimsy and color to the most unwhimsical of things, a parking lot.