PURPOSE: To stably support a vehicle frame by a method wherein the arrangement position of a universal pivot means to support the vehicle frame of the bogie, in a railway system to support a trailer runnable on a road on a bogie and transport it along a rail track.

CONSTITUTION: This railway system 1 transports a trailer 4, runnable on a road through wheels 5 having pneumatic tires, along a railway track with the system pulled by a traction unit 5, not shown. This system is provided with a bogie 9 to support first and second vehicle frames 7 and 68 through a bearing member 8. The bearing member 8 is rotatable around a vertical rotary shaft 23 based on a bogie chassis 70 and has a coupling arm 13 extending from the vertical rotary shaft 23 in the direction of the vehicle frame 68, and supports a vehicle frame 7 by a universal pivot means 50. This pivot means 50 is arranged at a bearing member piece 71, extending from the shaft 23 in the direction of the vehicle frame 7, at the outside of the shaft 23.