Analysis on the Design and Application of Centre-Axle Trailer Combinations

China is in the period of promoting the modernization of logistics transportation equipment, and developing standardized and van-type freight vehicles are the trend. With the release of national standards “Limits of dimensions, axle load and masses for motor vehicles, trailers, and combination vehicles” (GB 1589-2016), “Technical specifications for safety of power-driven vehicles operating on roads” (GB 7258-2017) and “General technical requirements for centre-axle trailer” (GB/T 37245-2018), the further advancement of the national non-standard vehicle transport vehicle management and the development of modular vehicle combination trials, the centre-axle trailer combination is gradually becoming one of the main models of road freight transportation in China, which marks the addition of a compliant, reasonable and standardized automobile train model to China’s medium and long-distance cargo transportation. This paper analyzes the advantages and disadvantages, design, and use points of the centre-axle trailer combination, and provides references for the standard development technology of this combination.