In the United States, the Surface Transportation Board says a Class I railroad is a railroad that gets $250 million or more in revenue every year. It was 1991 when they said it had to be at least $250 million. In 2012, $452,653,248 is how much it would be. In 2011, the Association of American Railroads says that Class I railroads had to get at least $433.2 million.