221.3—Application.
(a)
Except as provided in paragraph (b) of this section, this part applies to passenger, commuter and freight trains when operated on a standard gage main track which is part of the general railroad system of transportation.
(1)
A railroad that operates only trains consisting of historical or antiquated equipment for excursion, educational, or recreational purposes;
(2)
A train that operates only on track inside an installation which is not part of the general railroad system of transportation;
(3)
Rapid transit operations in an urban area that are not connected with the general railroad system of transportation.
[42 FR 2321, Jan. 11, 1977, as amended at 53 FR 28600, July 28, 1988]