49 U.S.C. § 28501

the term “Board” means the Surface Transportation Board;

the term “capital work” means maintenance, restoration, reconstruction, capacity enhancement, or rehabilitation work on trackage that would be treated, in accordance with generally accepted accounting principles, as a capital item rather than an expense;

the term “commuter rail passenger transportation” has the meaning given that term in section 24102;

the term “public transportation authority” means a local governmental authority (as defined in section 5302) established to provide, or make a contract providing for, commuter rail passenger transportation;

the term “rail carrier” means a person, other than a governmental authority, providing common carrier railroad transportation for compensation subject to the jurisdiction of the Board under chapter 105;

the term “segregated fixed guideway facility” means a fixed guideway facility constructed within the railroad right-of-way of a rail carrier but physically separate from trackage, including relocated trackage, within the right-of-way used by a rail carrier for freight transportation purposes; and

the term “trackage” means a railroad line of a rail carrier, including a spur, industrial, team, switching, side, yard, or station track, and a facility of a rail carrier.