The European Union Emissions Trading System has generated roughly 245 billion euros in revenue by mid-2025, and a growing number of policy analysts argue that a larger, more predictable share of this money should go into rail infrastructure. Rail is already one of the most energy efficient transport modes, and when powered by low carbon electricity it can deliver deep emission cuts per passenger or tonne kilometre compared to cars, trucks, or planes. Early examples from member states like Slovenia show ETS revenues being used for rail upgrades and cycle paths, with over one billion euros reportedly directed to rail infrastructure enhancements across the EU. The upcoming ETS2, which will apply a carbon price to road transport and building fuels, is expected to widen the funding base further. Sector organisations are calling for earmarking a portion of these revenues specifically for rail and integrating them into multi year investment plans. The challenge is that large rail projects need stable, long term funding for permitting, cross border coordination, and rolling stock. If member states commit to this approach, rail could become a central tool for cutting stubborn transport emissions rather than an afterthought in climate budgets.
