Ramp turn superelevation design method with consideration of drifting of heavy-duty trailer

The invention belongs to the technical field of port road design, in particular relates to a Ramp turn supperelcvation design method with the consideration of the driving characteristic of a heavy-duty trailer. The method comprises the following steps of: selecting a heavy-duty trailer; setting the condition for preventing the side slipping of the trailer; setting a drifting angle of a semitrailer into the formula shown in the specification of the invention when a drifting phenomenon happens; setting the occupation width of the trailer on the road when the trailer does not have accidents, such as side slipping, and the like; setting occupied lane width when the drifting accident happens; establishing a traffic flow imitation cellular automaton model on the basis of the parameters; establishing a comprehensive evaluation index of superelevation; and carrying out imitation test analysis and selecting proper superelevation. In the invention, an optimal superelevation value under specificroad linear design can be