Whether in Toronto, New York, or Tokyo, inappropriate passenger behaviors are ubiquitous on mass transit and have annoyed commuters for more than a century. Employing creative and engaging visuals and a broad scope of humor, transit agencies around the world, including our own MTA (and its predecessors) have tried to cajole and scold passengers into better behavior. Whether asking people not to smoke, to be safe at the edge of the platform, or to throw away their trash, the graphic posters and videos featured in this exhibit highlight a universal language of courtesy that we can all (hopefully) understand.