The problem has several practical applications in freight transportation and it is
N P-Hard in the strong sense. We propose an exact approach, based on a branchand-cut
algorithm, for the minimization of the routing cost, that iteratively calls a
branch-and-bound algorithm for checking the feasibility of the loadings. Heuristics
are also used in order to improve the overall performance of the algorithm. The
effectiveness of the approach is shown by means of computational results