On the left side of the car’s rear bumper was a sticker reading, “Share the road with bicycles.” On the right side was a sticker reading, “Who is John Galt?”
Source of the illustration: “View of Honolulu. No. 1. From the Harbor.” Sketched by Paul Emmert, lithographed by G. H. Burgess. San Francisco: Britton & Rey, 1854. Library of Congress, http://www.loc.gov/pictures/item/2003681551/. Photoshopped.