The MAK Center's project "How Many Billboards, Art in Stead" asked 21 contemporary artists to each produce a billboard to be placed around Los Angeles, giving residents a break from the generally un-stimulating clutter crowding their cityscapes.
Wouldn't it be cool if, for some amount of time per year, billboard owners were required to give a portion of their billboards over to art instituations for projects like this, the same way tv networks have to allow ad space for PSAs? And every once in a while you would glance at a billboard and see art instead of an ad?
Read more about the project (which is sadly over) in this NYT article.
Project website here.