S: (n) broad gauge (a railroad track (or its width) broader than the standard 56.5 inches)
S: (n) gantlet (the convergence of two parallel railroad tracks in a narrow place; the inner rails cross and run parallel and then diverge so a train remains on its own tracks at all times)
S: (n) narrow gauge (a railroad track (or its width) narrower than the standard 56.5 inches)
S: (n) switch (railroad track having two movable rails and necessary connections; used to turn a train from one track to another or to store rolling stock)
S: (n) tie, railroad tie, crosstie, sleeper (one of the cross braces that support the rails on a railway track) "the British call a railroad tie a sleeper"
S: (n) track, rail, rails, runway (a bar or pair of parallel bars of rolled steel making the railway along which railroad cars or other vehicles can roll)