The mode of road freight transportation changes from single vehicle transport to drop and pull transport. The efficiency, safety, and reliability of coupling between semi-trailer towing vehicle and semi-trailers is the key to developing drop and pull transport. Some technical clauses of standards on connection between semi-trailer towing vehicle and semi-trailers are not suitable requirements for drop and pull transport, and application status is not optimistic. This paper puts forward some suggestions based on analysis of articulated vehicle dimensions, interchangeability between semi-trailer towing vehicle and semi-trailers, electrical and pneumatic connector, fifth wheel kingpin, trailer landing gears, and so on, that would provide a reference to revise the relevant standards.
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