Transportation

The San Bernardino County Transportation Authority (SBCTA) marked a major milestone with the debut of the hybrid hydrogen fuel cell-battery electric passenger train, known as ZEMU.

ZEMU, short for Zero Emission Multiple Unit, is North America’s first self-powered, zero-emission passenger train that meets Federal Railroad Administration (FRA) requirements. The train uses hybrid hydrogen and battery technology to propel the train and power onboard electrical systems, with water vapor as the only emission generated from the propulsion system, making this a clean transit alternative.

As Board President Rick Denison said, “ZEMU is proof of our commitment to improving regional air quality, embracing innovation, and expanding clean-air transit options throughout the county.”

The ZEMU train is easily recognizable by its distinctive blue and white water-vapor design wrapped around the train’s two passenger cars and a center power pack where the hydrogen and battery propulsion system is located. ZEMU was built by Swiss train manufacturer Stadler and arrived in San Bernardino in June 2024. Since its arrival it underwent extensive testing to ensure compliance with Metrolink systems and FRA guidelines. For a list of the stations and boarding times, visit Metrolinktrains.com.