Abstract: A high-speed railway aerodynamic sleeper (1) including one central area (2), two support areas (3) on each side of the central area (2), on which the rails are placed, and two outer areas (4), located at the ends of the sleeper (1), following the support areas (3). The cross-section of the sleeper (1) includes, on the central area (2), and the support areas (3), and the two outer areas (4), a first bottom section (5) comprising a first polygon (7) having at least 4 sides and a second top section (6) having at least one second polygon (8) of n sides, n being?4, the first bottom section (5) and the second top section (6) being attached to each other, and the top base (10) of the first polygon (7) and the bottom base (9) of the second polygon (8) share their sides.

Abstract: A compound cross tie for railroad use, the method of making it, and a joiner used therein. The cross tie comprises a pair of wooden end members connected axially by the joiner, and a compressional member traversing the entire assembly: means are provided to prevent relative rotation among the various components.