We have already considered the yard trailer scheduling problem at the marine container terminal. Since the conventional operation for yard trailers is, multiple trailers are assigned to a specific quay crane, and the shuttle service between the quay crane and yard area. Then we have tried to develop the model for the yard trailer routing as “dynamic operation”, in order to reduce the empty movement. In this study, extra numerical experiments are conducted, in order to find the effects under combination of ship loading & unloading operations. From the computational results, the dynamic operation reduces travel distance about 10 to 20 % of the conventional one.
