Citizens Against Drunk Driving
Forrest P. Gill, a screen printer in Kansas City, Missouri, is credited with inventing the bumper sticker as we know it today. Gill discovered an excess of two wartime innovations in the 1940s: adhesive-backed paper and fluorescent paint. The bumper sticker was developed when he merged the two. His design concept was a big advance over the handcrafted signage that often dropped off automobiles or faded out quickly.
In 2008, a study was published that revealed a link between road rage and bumper stickers. There were hundres of volunteers that were questioned by Szlemko and his associates. The volunteers were asked about their automobiles and driving patters. The volunteers had to explain their vehicle's worth and condition as well as if they had customized it in any way.
Researchers had noted seat coverings, bumper stickers, unique paint jobs, stereos, and more. They also inquired about the participants' reactions to various driving circumstances.
Citizens Against Drunk Driving