The transport sector in Ireland is in need of decarbonisation if the country is to meet its climate targets. Transport is an integral aspect of the nation’s economy, with the importation of goods from neighbouring countries of France and the United Kingdom occurring using heavy goods vehicles (HGVs). With the current development in transport decarbonisation and evolution of the energy sector in the country, the adoption of electric vehicles (EV), both battery & hydrogen in the transport sector, may be an attainable pathway to mitigating carbon emissions, especially from the country’s heavy-duty vehicles. This review investigates the existing policies as they relate to the Irish transport sector and its decarbonisation targets. It investigates the challenges and the quick points that must be addressed for the decarbonisation targets to be met. It focuses on hydrogen-based transport and the necessary policies that could be explored as pathways to decarbonise the sector, especially the HGVs sector. The study will give policymakers an understanding of immediate actions to take and how these would impact the long-term decarbonisation strategy of the country.