In 1986, Sullivan called for the Interstate Commerce Commission to prevent the Chicago and Northwestern Railroad from discontinuing its railroad line to Riverton, Wyoming, as it would be "contrary to the interests of Fremont County and the state of Wyoming." Sullivan sought for the construction of the Superconducting Super Collider inside Wyoming. Sullivan asked W. Graham Claytor Jr. to restore Amtrak's passenger service through Wyoming which ended after the line was altered to travel through Colorado instead in 1983. During his tenure mobile phone service was provided to Wyoming and Sullivan performed some of the first mobile phone calls in the state when he called Mayor Judi Laird and received a call from Gerald Ford. Sullivan opposed the western United States being used for nuclear waste storage.
