49 U.S.C. § 20301 - U.S. Code - Unannotated Title 49. Transportation § 20301. Definition and nonapplication

(1) a train of 4-wheel coal cars.

(2) a train of 8-wheel standard logging cars if the height of each car from the top of the rail to the center of the coupling is not more than 25 inches.

(3) a locomotive used in hauling a train referred to in clause (2) of this subsection when the locomotive and cars of the train are used only to transport logs.

(4) a car, locomotive, or train used on a street railway.