I saw over on Boing Boing, that a highway near St. Louis got a little splash of color when a paint truck sprung a leak as it motored on. It does raise a number of questions for me, along the lines of - is there any way you (as the driver) would know you were leaking? If you did know, since it was non-toxic, would you just keep going? What situations call for a tanker truck full of paint? (If it was a tanker truck.) And is there a clause in the contract for what happens when the truck arrives less than full?
And then, I remembered when I was downtown seeing a block of DC painted pretty colors. Now this was no accident, it was part of the Corcoran's Colorfield Remix project. But still, very cool.