In Vietnam, the activities of the transport sector in general and road transport services in particular contribute significantly to economic growth and quality of life. The gross domestic product (GDP) of transport and warehousing activities has increased in recent years and reached 5.4% of the country’s total GDP in 2022. Due to, demand for passenger and cargo transport increased with the average annual increase of 2.9% and 10.2% in the period of 2015-2022, respectively. The road sector accounts for a large proportion of transport with 91.8% of total passenger volume and 79.8% of total cargo volume by 2022 (General Statistics Office, 2023). Fuel used for vehicles is mainly gasoline and diesel. Vehicles used in this sector are very diverse including motorbikes, cars (taxi), buses, passenger cars, trucks (light, medium and heavy).