Spain’s high-speed rail (HSR) network expanded rapidly under strong political and territorial integration objectives, resulting in a system whose scale exceeds what passenger demand alone would justify.
Relatively low construction costs per kilometer coexist with very low network utilization, causing a persistent supply?demand imbalance and slow economic performance.
Most Spanish HSR corridors deliver very weak or negative social returns, due to low ridership despite manageable investment costs.
Public and European Union funding dominate financing, while post-2020 competition improved fares and service but strained operators’ financial sustainability.
Spain’s experience underscores that institutional design and liberalization can enhance efficiency but cannot substitute for demand-led planning when assessing the long-term fiscal and economic sustainability of HSR investments.