The kangourou wagon ("kangaroo wagon") is a type of rail wagon designed for the transport of semi-trailers. It has a drawbridge forming a pocket in the low position (hence its name) allowing the carrier train (2 or 3 axles) of the semi-trailer to be placed and thus to respect the height of the loading gauge ( 4.2 m or 13 ft 9+3⁄8 in above top of rail for the loading gauge of the UIC).
These are special open wagons. The axle models are UIC K type, their bogie S type counterparts.