Spain Signs Contract for Aerodynamic Sleepers
Signal
Adif Alta Velocidad awarded a EUR 112.76 million contract for 680,400 aerodynamic railway sleepers for the Madrid–Barcelona line.
Impact
positiveThis contract impacts Spanish railway infrastructure and high-speed train manufacturers, as it aims to enhance operational efficiency and reduce maintenance costs associated with high-speed travel.
On June 11, 2026, Adif Alta Velocidad, Spain's railway infrastructure manager, awarded a contract valued at EUR 112.76 million for the supply of 680,400 aerodynamic railway sleepers. This initiative is part of the broader modernization efforts for the Madrid–Barcelona high-speed line, which is designed to accommodate trains traveling at speeds up to 350 km/h.
The contract specifically targets the Mejorada del Campo–Calatayud section of the line, with the sleeper production divided into four lots: Mejorada del Campo–Brihuega (232,400 units), Brihuega–Alcolea (143,150 units), Alcolea–Ariza (166,250 units), and Ariza–Calatayud (138,600 units). Although Adif has not disclosed the winning company, Travipos, a subsidiary of the German manufacturer RailOne, has received authorization to produce the new aerodynamic sleeper model.
The aerodynamic sleeper, referred to as the “aerotraviesa,” addresses critical challenges associated with high-speed rail travel. When trains exceed speeds of 300 km/h, aerodynamic flows can displace ballast particles, a phenomenon known as “ballast blow.” This issue can lead to significant damage to both trains and infrastructure, resulting in increased maintenance costs. The new sleeper design minimizes the flat surface exposed to air currents and increases the distance between the sleeper top and the ballast layer, effectively reducing aerodynamic loads in the ballast area by 21%, according to data from Adif and RailOne.
In addition to the sleeper contract, Adif is concurrently renewing rail fastening systems and conducting interventions on the Benamira and Río Blanco viaducts in Soria province. These comprehensive upgrades aim to enhance the reliability of the infrastructure and prepare the line for higher operational speeds.
The introduction of aerodynamic sleepers represents a significant technological advancement for the Spanish rail network. By mitigating the risks associated with high-speed travel, these innovations are expected to improve the overall performance and safety of the Madrid–Barcelona line, benefiting both passengers and operators.
