Port hinterland transportation with trucks is an important part of the maritime supply chain as a significant part of supply chain costs are generated here, e.g. due to empty container transportation. Horizontal collaboration among carriers offers potential for cost reduction, but needs to be set up in a way which is fair and advantageous in the long-run for all carriers involved. In this work, a new model is developed which takes these and other realistic requirements, e.g. the use of different container types and of empty container depots, into account. The results allow to quantify the benefits of collaboration for different collaborating group sizes and under different fairness mechanisms.