Road hauliers operating heavy goods vehicles powered by natural gas for vehicles (NGV) or planning to invest in this type of engine will find a wealth of useful information in this study (taxation, vehicle prices, financial support schemes, etc.). Vehicle specifications and costs are initially presented as ranges, reflecting the diversity of offerings and uses within this sector. At the end of the document, estimates of the total cost of ownership (TCO 2025) for a long-haul LNG heavy goods vehicle and a regional CNG heavy goods vehicle are compared with those of diesel articulated lorries operating in equivalent roles.