A railroad tie formed of a polymeric or polymeric composite material and configured for enhanced mechanical interaction with an underlying ballast. The tie includes at least a top longitudinal surface, a pair of side longitudinal surfaces, a bottom longitudinal surface, and two end faces. At least the bottom longitudinal surface includes a plurality of indentations formed along a length thereof. Additionally, the tie includes at least one serrated edge portion having a plurality of serrations, the at least one serrated edge portion formed along at least part of the longitudinal length of the tie at an edge between at least one of the side longitudinal surfaces and the bottom longitudinal surface to provide for enhanced mechanical interaction with the ballast.

A railroad tie formed of a polymeric or polymeric composite material and configured for enhanced mechanical interaction with an underlying ballast. The tie includes at least a top longitudinal surface, a pair of side longitudinal surfaces, a bottom longitudinal surface, and two end faces. At least the bottom longitudinal surface includes a plurality of indentations formed along a length thereof. Additionally, the tie includes at least one serrated edge portion having a plurality of serrations, the at least one serrated edge portion formed along at least part of the longitudinal length of the tie at an edge between at least one of the side longitudinal surfaces and the bottom longitudinal surface to provide for enhanced mechanical interaction with the ballast.

A railroad tie formed of a polymeric or polymeric composite material and configured for enhanced mechanical interaction with an underlying ballast. The tie includes at least a top longitudinal surface, a pair of side longitudinal surfaces, a bottom longitudinal surface, and two end faces. At least the bottom longitudinal surface includes a plurality of indentations formed along a length thereof. Additionally, the tie includes at least one serrated edge portion having a plurality of serrations, the at least one serrated edge portion formed along at least part of the longitudinal length of the tie at an edge between at least one of the side longitudinal surfaces and the bottom longitudinal surface to provide for enhanced mechanical interaction with the ballast.

A railroad tie formed of a polymeric or polymeric composite material and configured for enhanced mechanical interaction with an underlying ballast. The tie includes at least a top longitudinal surface, a pair of side longitudinal surfaces, a bottom longitudinal surface, and two end faces. At least the bottom longitudinal surface includes a plurality of indentations formed along a length thereof. Additionally, the tie includes at least one serrated edge portion having a plurality of serrations, the at least one serrated edge portion formed along at least part of the longitudinal length of the tie at an edge between at least one of the side longitudinal surfaces and the bottom longitudinal surface to provide for enhanced mechanical interaction with the ballast.

A railroad tie formed of a polymeric or polymeric composite material and configured for enhanced mechanical interaction with an underlying ballast. The tie includes at least a top longitudinal surface, a pair of side longitudinal surfaces, a bottom longitudinal surface, and two end faces. At least the bottom longitudinal surface includes a plurality of indentations formed along a length thereof. Additionally, the tie includes at least one serrated edge portion having a plurality of serrations, the at least one serrated edge portion formed along at least part of the longitudinal length of the tie at an edge between at least one of the side longitudinal surfaces and the bottom longitudinal surface to provide for enhanced mechanical interaction with the ballast.

A railroad tie formed of a polymeric or polymeric composite material and configured for enhanced mechanical interaction with an underlying ballast. The tie includes at least a top longitudinal surface, a pair of side longitudinal surfaces, a bottom longitudinal surface, and two end faces. At least the bottom longitudinal surface includes a plurality of indentations formed along a length thereof. Additionally, the tie includes at least one serrated edge portion having a plurality of serrations, the at least one serrated edge portion formed along at least part of the longitudinal length of the tie at an edge between at least one of the side longitudinal surfaces and the bottom longitudinal surface to provide for enhanced mechanical interaction with the ballast.

A composite railway sleeper (1; 50; 100) comprising an outer coating shell (2; 51; 101) made of composite plastic material and a shaped structural core (3; 52; 102), made of a material comprising at least concrete contained within said outer coating shell (2; 51; 510; 101), wherein said outer coating shell (2; 51; 510; 101) presents in the upper outer face (2a; 51a; 101a) two distinct and opposite groups of grooves (4; 53) suitable to receive the angular guide plates (G) belonging to pre-assembled elastic type fastening systems (64) for the connection of two respective rails (R) with said railway sleeper (1; 50; 100).

A composite railway sleeper (1; 50; 100) comprising an outer coating shell (2; 51; 101) made of composite plastic material and a shaped structural core (3; 52; 102), made of a material comprising at least concrete contained within said outer coating shell (2; 51; 510; 101), wherein said outer coating shell (2; 51; 510; 101) presents in the upper outer face (2a; 51a; 101a) two distinct and opposite groups of grooves (4; 53) suitable to receive the angular guide plates (G) belonging to pre-assembled elastic type fastening systems (64) for the connection of two respective rails (R) with said railway sleeper (1; 50; 100).

A composite railway sleeper (1; 50; 100) comprising an outer coating shell (2; 51; 101) made of composite plastic material and a shaped structural core (3; 52; 102), made of a material comprising at least concrete contained within said outer coating shell (2; 51; 510; 101), wherein said outer coating shell (2; 51; 510; 101) presents in the upper outer face (2a; 51a; 101a) two distinct and opposite groups of grooves (4; 53) suitable to receive the angular guide plates (G) belonging to pre-assembled elastic type fastening systems (64) for the connection of two respective rails (R) with said railway sleeper (1; 50; 100).

A composite railway sleeper (1; 50; 100) comprising an outer coating shell (2; 51; 101) made of composite plastic material and a shaped structural core (3; 52; 102), made of a material comprising at least concrete contained within said outer coating shell (2; 51; 510; 101), wherein said outer coating shell (2; 51; 510; 101) presents in the upper outer face (2a; 51a; 101a) two distinct and opposite groups of grooves (4; 53) suitable to receive the angular guide plates (G) belonging to pre-assembled elastic type fastening systems (64) for the connection of two respective rails (R) with said railway sleeper (1; 50; 100).