A major milestone in sustainable rail transport is set to take shape in Italy, as Swiss train manufacturer Stadler and Sardinian transport operator ARST move forward with plans to launch the world’s first hydrogen-powered trains designed specifically for narrow-gauge railway lines.
The new trains are scheduled to enter passenger service in 2028 and will operate on the ARST-managed routes connecting Alghero Airport–Mamuntanas, Sassari–Alghero, and Sassari–Sorso.
The project is expected to reduce more than 2,100 tonnes of CO2 emissions annually compared to diesel-powered trains, equivalent to approximately 450 car trips around the world.
“With the commissioning of the first hydrogen-powered train designed for narrow-gauge railways, Sardinia is proving itself a pioneer of technological innovation in the transport sector. This is the first train of its kind, specifically designed for contexts similar to ours with the aim of turning a limitation into a great opportunity,” said Barbara Manca, Regional Minister for Transport of the Autonomous Region of Sardinia.
“The hydrogen trains, which will be deployed on ARST lines, are a shining example for the environment, the local economy and the development of key skills in our region,” Manca added.
The trains feature a specialized propulsion system with hydrogen tanks and fuel cells housed within a central Power Pack carriage. This unit supplies electricity to onboard traction batteries, enabling operation on non-electrified railway lines without relying on fossil fuels.
A key aspect of the project is that the hydrogen fuel will be produced locally using 100% solar energy, creating a fully renewable energy cycle from production to train operations. The trains will emit only water vapor during operation.
“Stadler is the only train manufacturer in the world that designs and builds hydrogen trains for narrow-gauge lines. Together with ARST, we have developed a solution that makes a tangible contribution to the decarbonization of rail transport,” said Dr. Ansgar Brockmeyer, Head of Marketing and Sales and Deputy CEO of the Stadler Group.
Passengers can expect quieter journeys, reduced vibration, low-floor boarding for improved accessibility, panoramic windows, air-conditioned cabins, and enhanced onboard comfort. Crew members will also benefit from dedicated facilities and independent climate control systems.
Under a 2023 agreement, Stadler will supply 10 hydrogen trains to ARST. The company is also manufacturing 9 similar units for Ferrovie della Calabria and 2 additional trains for Sicily’s Ferrovia Circumetnea network.
Before entering service, the trains will undergo extensive safety and operational testing to meet the requirements of Italy’s National Agency for the Safety of Railways and Road and Motorway Infrastructure (ANSFISA).
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