Abstract
The paper aimed at establishing the relationship between age, engine capacity, fuel type and fuel efficiency and carbon emissions. The relationship was obtained using panel data on newly imported registered vehicle stock obtained from Uganda Revenue Authority. This involved collecting data on imported vehicle inventory into Uganda for the period from 2013 to 2017 which was later analysed using the stata software. The findings indicated a positive relationship between a vehicles age, engine capacity, vehicle category (Light Duty Vehicles, Medium Duty Vehicles and Heavy Duty Vehicles) and fuel efficiency and carbon emissions. A comparison with the global fuel efficiency targets indicated that more fuel was being consumed in Uganda compared to non-OECD countries. A reduction in fuel consumption and emissions was observed in petrol vehicles while diesel vehicles had increased carbon emissions and fuel consumptions due to an increase in engine capacities. The findings imply that government should develop policy options that promote vehicle fuel efficiency, transport system operators may undergo training in fuel efficiency issues that will result in an attitudinal change while academicians need to carry out more research comparing the effect of transport systems operators ages, level education and income on carbon emissions and fuel efficiency. The majority of research on fuel efficiency and carbon emissions uses survey data rather than panel data. Further, previous research is focused on vehicles that are already on the road rather than focusing on the effect of age, engine capacity, fuel type on fuel efficiency and carbon emissions.
Highlights
Fuel efficiency of vehicles is a subject that has attracted attention of many researchers
The paper aimed at establishing the relationship between age, engine capacity, fuel type and fuel efficiency and carbon emissions
Results include the types and age of registered vehicles based on vehicle weights; Age, Engine Capacity, Fleet fuel type and Fuel efficiency; LDVs Fuel type, Engine capacities and Fuel Efficiency; and Fleet fuel type and Carbon emissions
Summary
Fuel efficiency of vehicles is a subject that has attracted attention of many researchers. Much of the emphasis is placed on fuel efficiency rather than carbon emissions. In the developing world, where the use of vehicles is on the rise. The global vehicle fleet is set to increase rapidly from about 850 million today to as much as 2.5 to 3 billion by 2050 (Global Fuel Economy Initiative (GFEI), 2016). Ninety percent of this growth is set to take place in developing and transitional countries (Global Fuel Efficiency initiative -State-of-the-World-report, 2016). As the average vehicle fuel economy in these countries is stagnant, it is predicted that greenhouse gas emissions of the global fleet are set to triple. Black carbon and pollutant emissions are set to increase with major health and short-term climate impacts
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