The San Bernardino County Transportation Authority (SBCTA) is making strides towards introducing North America's first hydrogen-powered passenger trainset, known as ZEMU, in Southern California. This innovative train, developed in partnership with Swiss company Stadler, utilizes a combination of hydrogen fuel cells and batteries to propel its operation, emitting only water vapor as a result. The agency is embarking on the second phase of testing, focusing on operational performance, communication technology, and grade-crossing validations. The testing, set to begin on the 9-mile Arrow Corridor between San Bernardino and Redlands, will take place on weekday nights until January 2025. SBCTA's long-term vision for zero-emissions rail transit technology is materializing, with the ZEMU trainset set to offer emissions-free travel once operational. With modifications underway at the Arrow Maintenance Facility to accommodate a hydrogen storage and fueling station, SBCTA's efforts mark a pivotal moment for promoting clean energy in rail transportation in Southern California. The anticipation is high for the hydrogen-powered train to commence service early in 2025, showcasing a significant step forward in sustainable public transportation.