I emailed the Chicago-L.org webmaster with several pictures I took a week ago, and this is what he said: "That car was sold to Joe Cacciatore - Catchmo Media. Don't know what their plan is for the car, or if it's location in that lot is permanent. The car left CTA clean, so the graffiti was applied later, whether as an act of intentional art or as vandalism." My photos show the spray paint intact, and these more recent ones show it being removed, so my guess is vandalism. The extension cord also wasn't there a week ago. As for how it got there, I'm guessing truck, but it is interesting that I noticed and my photos show that there are grooves in the metal plates it's on that look like they acted as a shallow rail almost. The wheels are chalked in place now.