Local governments hardly have a clear overview of their current progress in reducing emissions. This could be explained by the inadequacy of available tools. To address this issue, this research used a design cycle to explore the development of a feasible and useful method for allocating emissions in the road freight transport subsector. Four methods, two existing and two proposed, were evaluated against criteria derived from a literature review. A synthetic case study of Delft was conducted to evaluate these four methods and an indirect approach for relative accuracy, adaptability and feasibility. One of the proposed methods showed promise, but further research is needed to evaluate its absolute uncertainty. This proposed method is recommended to pursue, up until the moment the international standard only includes one method per subsector. Additionally, the proposed indirect allocation approach may offer greater flexibility when standards change and data is not fully accessible.