1956 Mercury XM-Turnpike Cruiser. "Carted around the country in a semitrailer with big picture windows on each side, the XM-Turnpike Cruiser was described as 'not merely a 'dream' car. It is a full-scale, fully operative automotive styling laboratory dedicated to ... pioneering, testing, and perfecting new ideas in design, new features, new safety and new power application.'" — auto.howstuffworks.com