Abstract: I projektet analyseras transportsystem för långväga landtransporter som använder sig av längre/tyngre väg- eller järnvägsfordon än idag bl a vad gäller energieffektivisering och miljökostnader. Det samhällsekonomiska utfallet av användningen av dessa transportsystem beräknas. I projektet ingår en nationell och en internationell del.Abstract: The project will analyse transport systems for long distance freight transport using larger road- and railway-vehicles. A CBA will be carried out and energy and greenhouse gas effects will be measured. The project has one domestic part where a number of trials of larger road vehicles will be evaluated. Based on these evaluation scenarios for new larger road vehicles will be created (longer than 25.25 and heavier than 60 tonnes). A similar activity will take place in the railway sector. In an international part scenarios with vehicles larger than 18.75 meter and heavier than 40 tonne will be evaluated. Co-modality and competition between transport modes will be analysed.