A vehicle segment (50, 50', 60, 60', 70, 70') for a multi-unit rail vehicle (500, 600, 700), comprising: - a first vehicle body segment (7, 7'); and - a second vehicle body segment (6, 6') rotatably connected to the first vehicle body segment (7, 7') about a vertical axis (10, 10', z) of the vehicle segment (50, 50', 60, 60', 70, 70'), wherein a first passenger transfer area (P1, P1') is formed between the first vehicle body segment (7, 7') and the second vehicle body segment (6, 6'), the second vehicle body segment (6, 6') comprising, at an end facing away from the first vehicle body segment (7, 7'), two mechanical coupling elements (11, 11') for coupling a further vehicle segment (50', 50, 60', 60, 70', 70), an electrical coupling element (2, 2') for electrical connection to the further vehicle segment (50', 50, 60', 60, 70', 70) and a bellows (4, 4') for a second passenger transfer area to the further vehicle segment (50', 50, 60', 60, 70', 70) or a connection for the bellows (4, 4'), and wherein the two mechanical coupling elements (11, 11') are connected to the second vehicle body segment (6, 6') via a respective joint (1, 1') which has only one degree of freedom and enables a rotary movement about a transverse axis (y) which is perpendicular to the vertical axis (z) and to a longitudinal axis (x) of the second vehicle body segment (6, 6') which is perpendicular to the vertical axis (z), wherein the first vehicle body segment (7, 7') is connected to the second vehicle body segment (6, 6') via a swivel joint (3, 3') with only one degree of freedom, wherein the vehicle segment (50, 50', 60, 60', 70, 70') is a statically determined system with only one degree of freedom - a first vehicle body segment (7, 7'); and - a second vehicle body segment (6, 6') rotatably connected to the first vehicle body segment (7, 7') about a vertical axis (10, 10', z) of the vehicle segment (50, 50', 60, 60', 70, 70'), wherein a first passenger transfer area (P1, P1') is formed between the first vehicle body segment (7, 7') and the second vehicle body segment (6, 6'), the second vehicle body segment (6, 6') comprising, at an end facing away from the first vehicle body segment (7, 7'), two mechanical coupling elements (11, 11') for coupling a further vehicle segment (50', 50, 60', 60, 70', 70), an electrical coupling element (2, 2') for electrical connection to the further vehicle segment (50', 50, 60', 60, 70', 70) and a bellows (4, 4') for a second passenger transfer area to the further vehicle segment (50', 50, 60', 60, 70', 70) or a connection for the bellows (4, 4'), and wherein the two mechanical coupling elements (11, 11') are connected to the second vehicle body segment (6, 6') via a respective joint (1, 1') which has only one degree of freedom and enables a rotary movement about a transverse axis (y) which is perpendicular to the vertical axis (z) and to a longitudinal axis (x) of the second vehicle body segment (6, 6') which is perpendicular to the vertical axis (z), wherein the first vehicle body segment (7, 7') is connected to the second vehicle body segment (6, 6') via a swivel joint (3, 3') with only one degree of freedom, wherein the vehicle segment (50, 50', 60, 60', 70, 70') is a statically determined system with only one degree of freedom wherein a first passenger transfer area (P1, P1') is formed between the first vehicle body segment (7, 7') and the second vehicle body segment (6, 6'), the second vehicle body segment (6, 6') comprising, at an end facing away from the first vehicle body segment (7, 7'), two mechanical coupling elements (11, 11') for coupling a further vehicle segment (50', 50, 60', 60, 70', 70), an electrical coupling element (2, 2') for electrical connection to the further vehicle segment (50', 50, 60', 60, 70', 70) and a bellows (4, 4') for a second passenger transfer area to the further vehicle segment (50', 50, 60', 60, 70', 70) or a connection for the bellows (4, 4'), and wherein the two mechanical coupling elements (11, 11') are connected to the second vehicle body segment (6, 6') via a respective joint (1, 1') which has only one degree of freedom and enables a rotary movement about a transverse axis (y) which is perpendicular to the vertical axis (z) and to a longitudinal axis (x) of the second vehicle body segment (6, 6') which is perpendicular to the vertical axis (z), wherein the first vehicle body segment (7, 7') is connected to the second vehicle body segment (6, 6') via a swivel joint (3, 3') with only one degree of freedom, wherein the vehicle segment (50, 50', 60, 60', 70, 70') is a statically determined system with only one degree of freedom