This paper examines the interplay between transport and competition law within the EU, particularly focusing on case law in the context of liberalization. The transport sector, marked by natural monopolies, often requires specific regulation alongside competition law to address issues like exclusionary practices by incumbents. Despite liberalization efforts, dominant players may still hinder competition through control of essential infrastructure. The entry discusses legal and regulatory strategies to ensure fair market access and competition and considers broader socio-economic impacts such as regional development and environmental sustainability