The Federal Railroad Administration (FRA) was created in 1966 and took on functions of the Alaska Railroad, Bureau of Railroad Safety and Service, and the Office of High Speed Ground Transportation. It handles passenger rail traffic, railroad safety, and rail freight.
We have a partial collection of FRA publications. Here are some examples:
Railroad accident investigation reports (TD 3.110:)
FRA-ORD & D series (TD 3.15:) Research & development technical reports.
We also have copies of laws, regulations, Congressional hearings, and other documents related to rail transportation and safety.