The invention discloses a highway-railway
convertible car, comprising a highway container semi-trailer, a one-position traction
bolster assembly, a two-position traction
bolster assembly, a coupler buffer device, a
bogie and an air and manual
brake device. The highway container semi-trailer comprises a frame, container locks, ground jacks, a suspension damping
system and protective devices. Two parallel centre sill assemblies are welded by adopting connection plate assemblies, to form the main part for bearing the railway longitudinal force; a secondary hook and a primary hook serve as the connectors and are connected with traction
bolster assemblies at the head and the
tail, so that the highway-railway
convertible car can meet the requirement of railway transportation; when the highway-railway
convertible car is used for railway transportation, a rear protective device is overturned upwards from the outside of the car around a rotating shaft, so that the requirements of assembling the railway
bogie and the car body are met; and the suspension damping
system adopts vibration damping gasbag and lifting gasbag structures, so that the matching of the highway container semi-trailer, a highway semi-trailer
tractor and the
bogie of the highway-railway convertible car during the conversion between highways and railways and the requirement of the gap between the road tire and the lower margin during railway transportation are met.