Railroad

Railroad means all forms of non-highway ground transportation that run on rails or electro-magnetic guideways, including commuter or other short-haul rail passenger service in a metropolitan or suburban area, and (2) high-speed ground transportation systems that connect metropolitan areas, without regard to whether they use new technologies not associated with traditional railroads. Such term does not include rapid transit operations within an urban area that are not connected to the general railroad system of transportation.

Source

49 CFR § 214.7

Scoping language

Unless otherwise provided, as used in this part