North America’s first hybrid hydrogen fuel cell-battery electric passenger train, known as ZEMU, entered service last week in San Bernardino, marking a historical mile- stone for the San Bernardino County Transportation Authority (SBCTA), who led the development of the train.

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 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 operates on Metrolink’s nine-mile Arrow Corridor between San Bernardino and Redlands. A list of the Arrow Co

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