Describes significant records in the National Archives and Records Admin. (NARA) that relate to railroads in the U.S. (including Alaska, Hawaii, and Puerto Rico), Canada, Mexico, and the Panama Canal. It describes documentation concerning the railroads and their interaction with the U.S. Government from the beginning of railroading to 1996. Describes more than 1,000 series of textual, cartographic, still picture, motion picture, sound recording, and electronic records in 57 record groups housed in the Wash., DC, area and the regional archives branches of NARA as of Dec. 31, 1996, as well as a few records in the Presidential libraries. The record description sections are arranged by general subject category, thereunder by record group and type of records.