History: Rail Transportation In The United States

America's first dedicated high-speed rail infrastructure is likely to be in California, consisting of a high speed line between Anaheim and San Francisco via Los Angeles and San Jose. The line is scheduled to begin construction by September 2012 in the Central Valley. The new line planned for construction in California would have a top speed in excess of 150 mph (240 km/h) and is classified as a High-Speed Rail–Express corridor.
Rolling stock reporting marks
Every piece of railroad rolling stock operating in North American interchange service is required to carry a standardized set of reporting marks. The marks are made up of a two- to four-letter code identifying the owner of the equipment accompanied by an identification number and statistics on the equipment's capacity and tare (unloaded) weight. Marks whose codes end in X (such as TTGX) are used on equipment owned by entities that are not common carrier railroads themselves. Marks whose codes end in U are used on containers that are carried in intermodal transport, and marks whose codes end in Z are used on trailers that are carried in intermodal transport.