This Special Bibliography prepared from the magnetic-tape files of the Railroad Research Information Service, contains selections which were accessioned between 1973 and 1976. Although the literature which is referenced does in a few cases date back three decades, all listings are considered pertinent to contemporary railroad safety problems. The volume is divided into three main categories (with sections listed after each): Improved Track Structures Research (Track Accident Reduction, Improved Track Performance); Rail Vehicle Safety Research (Rolling Stock/Safety, Rolling Stock/Track-Train Dynamics, Locomotives/Safety, Locomotives/ Track-Train Dynamics, Hazardous Materials Cars, Grade Crossings, Human Factors, Control Systems); Improved Inspection, Detection and Testing Research (Track Inspection and Testing, Automated Track Inspection, Vehicle Inspection, Life Cycle Testing). All of the citations in this Bibliography appear also in one of the regular RRIS semiannual publications. Because it cites only safety-related topics, this Bibliography should not be considered a comprehensive collection of RRIS citations; it incorporates about one-fourth of all RRIS holdings. There are 4,368 listings, involving 3,131 abstracts of research reports and journal articles, and descriptions of computer programs with some individual citations appearing in more than one of the 14 sections. The categories in this Bibliography are based on the functional responsibilities of the groups comprising the staff of the FRA Office of Rail Safety Research; these categories differ from the regular RRIS classification scheme. While categories differ, the accession numbers are common under either type of classification and may be used for identification.