A device for a railroad track designed to be traveled in a longitudinal direction by a railway vehicle including at least one wheel, the device comprising: - a first rail and a second rail extending longitudinally one in the extension of the other, and being separated by a space, each of the first and second rail comprising a proximal portion (61, 75) and a distal portion (63, 77) relative to said space, the proximal portions (61, 75) and the distal portions (63, 77) respectively defining running surfaces (69, 73, 81, 82) for said wheel situated substantially in a same running plane defined by the longitudinal direction and a transverse direction substantially perpendicular to the longitudinal direction, the running surface (69, 81) of the proximal portion (61, 75) transversely having, for each of the first rail and the second rail, a width smaller than a width of the running surface (73, 82) of the distal portion (63, 77), and - a central device extending longitudinally from the proximal portion of the first rail to the proximal portion of the second rail, the central device forming, in the running plane, a central running surface continuous from a first point of the proximal portion of the first rail to a second point of the proximal portion of the second rail if projected on the longitudinal direction, and - a first distal device and a second distal device, each extending longitudinally from the distal portion (63, 77) to the proximal portion (61, 75), respectively, of the first rail and the second rail, the first distal device and the second distal device respectively forming two additional running surfaces (97, 105) in the running plane, characterized in that - each of the distal portions (63, 77) comprises a first portion (63A, 77A) preferably corresponding to the common rail of said railway, a second portion having a first transverse thinning, and a transition portion (63C, 77C) situated longitudinally between the first portion (63A, 77A) and the second portion (63B, 77B), and - the first distal device and the second distal device are situated transversely respectively against the second portions (63B, 77B) of the distal portions (63, 77), the additional running surfaces (97, 105) being continuous respectively from a third point of the distal portion of the first rail to the first point, and from the second point to a fourth point of the distal portion of the second rail if projected on the longitudinal direction. - a first rail and a second rail extending longitudinally one in the extension of the other, and being separated by a space, each of the first and second rail comprising a proximal portion (61, 75) and a distal portion (63, 77) relative to said space, the proximal portions (61, 75) and the distal portions (63, 77) respectively defining running surfaces (69, 73, 81, 82) for said wheel situated substantially in a same running plane defined by the longitudinal direction and a transverse direction substantially perpendicular to the longitudinal direction, the running surface (69, 81) of the proximal portion (61, 75) transversely having, for each of the first rail and the second rail, a width smaller than a width of the running surface (73, 82) of the distal portion (63, 77), and - a central device extending longitudinally from the proximal portion of the first rail to the proximal portion of the second rail, the central device forming, in the running plane, a central running surface continuous from a first point of the proximal portion of the first rail to a second point of the proximal portion of the second rail if projected on the longitudinal direction, and - a first distal device and a second distal device, each extending longitudinally from the distal portion (63, 77) to the proximal portion (61, 75), respectively, of the first rail and the second rail, the first distal device and the second distal device respectively forming two additional running surfaces (97, 105) in the running plane, - each of the distal portions (63, 77) comprises a first portion (63A, 77A) preferably corresponding to the common rail of said railway, a second portion having a first transverse thinning, and a transition portion (63C, 77C) situated longitudinally between the first portion (63A, 77A) and the second portion (63B, 77B), and - the first distal device and the second distal device are situated transversely respectively against the second portions (63B, 77B) of the distal portions (63, 77),