This report identifies proven measures that decrease road freight’s CO2 emissions. Goods transport by road consumes around 50% of all diesel fuel and accounts for 80% of the global net increase in diesel use since 2000. Projections see road freight activity at least doubling to 2050, offsetting efficiency gains and increasing road freight CO2 emissions. The report highlights policy areas that need adjustment for effective decarbonisation of road freight and points to fields where more robust evidence through further research is needed. It collects insights held at a workshop organised by the International Transport Forum in June 2018 in Paris and features the results of a survey among experts.