49 CFR 241.3 - Application and responsibility for compliance.
(a) Except as provided in paragraph (b) of this section, this part applies to all railroads.
(b) This part does not apply to -
(2) Rapid transit operations in an urban area that are not connected to the general railroad system of transportation.
(c) Although the duties imposed by this part are generally stated in terms of a duty of a railroad, each person, including a contractor for a railroad, who performs a function covered by this part, shall perform that function in accordance with this part.