Slated to begin service this fall between the California cities of San Bernardino and Redlands, the arrival of North America’s first self-powered, zero-emission passenger train that will meet Federal Railroad Administration (FRA) regulations, has begun its final testing phase.

The train’s arrival at the San Bernardino Depot Train Station marks a significant milestone on its incredible journey from concept to reality.

The Zero Emission Multiple Unit

The passenger train, a Zero Emission Multiple Unit (ZEMU), uses a hybrid hydrogen and battery technology to propel the train and power onboard electrical systems.

Water vapor is the only emission generated from the propulsion system, making this a clean transit alternative.

The train’s arrival to Southern California represents more than 10 years of planning, including four years of train development, by the San Bernardino County Transportation Authority (SBCTA), which saw the need for efficient, sustainable passenger rail as part of the regional transportation ecosystem.

The agency serves one of the fastest-growing economic and population centers in the country, as well as one of the more challenged air quality basins in North America.

ZEMU’s Journey

ZEMU’s journey began in eastern Switzerland, where it was built by Stadler at the company’s headquarters. From there, it was transported by truck and then barge to Belgium where it set off on its voyage across the Atlantic Ocean.

ZEMU arrived in the U.S. at the Galveston, Texas port in fall of 2023 where it continued its journey on American soil to the Transportation Technology Center in Pueblo, Colo., for safety testing.

Taking a short break from testing, Stadler and SBCTA debuted ZEMU at the October 2023 American Public Transportation Association’s annual EXPO in Orlando, Fla., to showcase the innovative hydrogen-powered rail technology.

At the conclusion of testing, a Burlington Northern Santa Fe locomotive coupled with ZEMU on June 18, to pull the new train more than 1,000 miles over two days from Pueblo to San Bernardino.

“ZEMU’s arrival in San Bernardino is a significant milestone recognizing years of strategic planning for a greener rail system and a commitment to innovative transportation solutions in San Bernardino County,” SBCTA Board President Ray Marquez said. “I look forward to county residents and visitors riding ZEMU on the Arrow line later this year.”

Special Branding

The new ZEMU is easy to spot with its signature blue and white water-vapor design wrapped around the train’s two passenger cars and center power pack where the hydrogen and battery propulsion system is located.

In the coming months, ZEMU will complete testing, including trips on the Arrow line and Metrolink system checks.