Abstract for: Integrating Green Hydrogen into the Transportation System: Policy, Barriers, and Pathways for Decarbonisation

The transportation sector plays a significant role in global carbon emissions, necessitating urgent decarbonisation strategies. Green hydrogen has emerged as a viable alternative fuel, offering a pathway to reducing fossil fuel dependency. However, its large-scale adoption faces multiple challenges, including infrastructure limitations, policy misalignment, and economic constraints. This study explores these barriers and examines how strategic policies can accelerate green hydrogen integration into transportation systems. This study employs a three-step approach to assess the green hydrogen transition in transportation. First, it evaluates renewable energy capacity to determine technical feasibility and infrastructure constraints. Second, it analyses social and environmental factors, including public acceptance and socio-economic impacts. Finally, economic data on hydrogen production and policy incentives are examined across developed and developing nations, ensuring a comparative perspective. The transition to green hydrogen in transportation requires addressing technical, economic, and policy challenges. While its potential to reduce carbon emissions is widely acknowledged, infrastructure limitations, policy gaps, and financial constraints hinder its large-scale adoption. System Dynamics modelling enables the identification of feedback mechanisms influencing this transition, providing insights for policymakers to design strategies that enhance hydrogen adoption, energy security, and sustainable transport systems.