The International Union of Railways (UIC) has published a new study on financing models for high-speed rail infrastructure. The report analyzes approximately 20 projects in Europe, Asia, and the Americas and shows that high-speed rail lines are among the most expensive infrastructure investments a country can undertake.

The study, titled“Financing Models for High-Speed Rail Infrastructure”, was conducted in collaboration with the Florence School of Regulation, a division of the European University Institute. Four key UIC members also contributed to the report: the Spanish infrastructure manager ADIF, the German railway group DB, the Italian railway group FSI, and the French railway company SNCF.

The report analyzes how high-speed projects can be structured, financed, and implemented in a context marked by ever-greater political ambitions, but also by increased pressure on public finances.

According to the UIC, high-speed rail infrastructure has an average construction cost of approximately EUR 45.5 million per kilometer globally. However, costs vary significantly depending on the country, the type of project, terrain conditions, the urban environment, or the maturity of public procurement systems.

In difficult terrain or urban areas, costs can be considerably higher, while in countries with extensive procurement experience and favorable geography, they can be lower.

The UIC emphasizes that high-speed rail projects require a tailored financial architecture, as negative cash flows can persist for more than a decade, and revenues are structurally limited by the regulatory framework.

The issue of financing becomes all the more important in Europe, where the European Commission has a mandate to develop a European Union Master Plan for High-Speed Trains. In this context, investment and financing models have taken center stage in the transport policy debate.

The UIC report analyzes three main financing approaches: public delivery, public-private partnerships, and the regulated asset model.

The first option analyzed is public delivery of projects, which remains the dominant model worldwide and, generally, the option with the lowest financing cost.

The report identifies several tools that can strengthen the long-term sustainability of this model. These include dedicated funds for rail investments, multi-year planning, and corporate financing through loans or green bonds.

This model is particularly important for infrastructure projects of high strategic value, where the economic, social, and environmental benefits outweigh the direct revenues generated by operating the line.

The study also analyzes public-private partnerships (PPPs), which it describes as a potential fiscal bridge in situations where public budgets are severely constrained.

UIC points out, however, that the success of these models depends on a realistic allocation of risks. The report indicates a preference for availability-based structures, in which payments depend on the provision of infrastructure, rather than those based directly on actual traffic.

This distinction is important for high-speed lines, as traffic and revenues can be influenced by numerous external factors, ranging from pricing policy and competition from other modes of transport to economic or demographic changes.

The third approach analyzed is the Regulated Asset Base (RAB) model. This is presented as a governance and regulatory framework that can offer a lower cost of capital than public-private partnerships, but with more flexibility than very long-term contracts.

Under this model, investments are integrated into a regulated framework, where revenues and cost recovery are determined based on clear rules. The UIC notes that RAB can become a relevant option for projects requiring a balance between predictability, public control, and attracting capital.

The report also addresses carbon financing as a structural tool to support projects. Shifting travel from aviation and road transport to high-speed rail generates significant reductions in CO2 emissions.

UIC shows that these avoided emissions can be monetized through the EU Emissions Trading System (EU ETS) and can contribute significantly to project financing, regardless of the chosen delivery model.

This approach places the financing of high-speed lines not only within the realm of transport infrastructure but also within that of climate and energy transition policies.

The report was coordinated by the UIC’s Passenger Department and guided by the UIC Intercity and High-Speed Committee (ICHSC).

UIC announces that it is already working on transforming the study’s conclusions into an interactive decision-support tool for practitioners and policymakers.

The goal is to make the report’s findings easier to use in shaping future high-speed projects, at a time when Europe is increasingly discussing the expansion of the high-speed rail network and the necessary funding sources.