There is a great need for better forecast models of freight transport. Some attempts to improve model results have already been made and freight modelling is moving to more activity-based models, like in passenger transport. In this paper a contribution to this process is been made, by exposing the main issues in freight transport modelling. First, the different agents that are involved in the decisions making process were given. These agents are necessary to construct distribution channels and supply chains, which may facilitate freight transport. Secondly, the many logistics elements and decisions that come with this entire process were discussed and have to be taken into account when modelling freight flows. Furthermore, some recommendations have been made to arrive at a more comprehensive activity-based freight model.
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