"Long haul semi-trailer truck - Liquefied natural gas" index intends to observe the evolution of the costs of long haul road freight transport by means of semi-trailer trucks with GVW up to 44t during transport operations for hire or reward. Long haul is referred to be domestic or international transport whose operating constraints make it impossible or uncertain for the driver to return home daily.
This index remains valid for the costs of a rented vehicle, under identical operating conditions.

View the study – CNG heavy goods vehicles – Updated December 2025
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.