Swiss manufacturer Stadler and Sardinian operator ARST have created the first hydrogen train built to run on the unique narrow-gauge railway network of Sardinia, Calabria, and Sicily, marking a breakthrough in eco-friendly rail transport tailored to challenging track conditions.
- First hydrogen train tailored to 950 mm narrow-gauge tracks
- Onsite solar-powered hydrogen production for zero emissions
- Operation starting in Sardinia by 2028, expanding to southern Italy
What happened
Stadler, a Swiss train maker, partnered with ARST, Sardinia's regional transport operator, to design and unveil the world’s first hydrogen-powered train specifically for narrow-gauge railways. These tracks, measuring 950 mm in width, impose strict axle-load limits that challenged existing train designs, requiring a completely new lightweight train with an aluminum body and a specially concentrated power system within a dedicated central car.
This train uses fuel cells to convert compressed hydrogen into electricity, charging traction batteries that power the wheels. The propulsion hardware is compacted within one car, allowing passenger cars to offer features like air conditioning, panoramic views, and easy access for passengers with mobility challenges. The project also plans a full transition to hydrogen made onsite through solar-powered electrolysis, ensuring a clean energy cycle from start to finish.
Why it feels good
This narrow-gauge hydrogen train stands apart from other European models by integrating zero-emission hydrogen production directly into the rail network, eliminating environmental impact from the fuel source through to propulsion. ARST’s commitment to producing solar hydrogen showcases an innovative path toward decarbonizing regional transport with self-sufficiency and sustainability baked in.
Beyond reducing CO2 emissions by more than 2,100 metric tons annually compared to diesel trains, the project signals a strategic shift for ARST—from just operating transport to becoming an energy company that powers its own fleet. This bold move offers hope for cleaner regional travel and sets a strong example for other narrow-gauge networks globally.
What to enjoy or watch next
The first hydrogen trains are set to begin service in 2028 on three routes in northern Sardinia, connecting Alghero Airport with Mamuntanas, and linking Sassari with Alghero and Sorso. Following successful certification by Italy’s rail safety authority, the project will expand with more trains ordered for Calabria and Sicily, supported by national efforts to decarbonize southern Italy’s railways.
Travelers and green technology enthusiasts can watch this initiative as a pioneering model combining heritage rail infrastructure with cutting-edge clean technologies. Its success could inspire similar projects worldwide where historic rail networks still serve remote communities, bridging the past with a sustainable future.