The San Bernardino County Transportation Authority (SBCTA) is actively working on the integration of its Zero Emission Multiple Unit (ZEMU) passenger train into the Metrolink fleet for the eastern section of the San Bernardino Line. To prepare for the launch of this hydrogen fuel cell-battery hybrid vehicle, the ZEMU team is conducting static testing that involves a series of tasks to ensure safety and operational readiness. These tasks include propulsion diagnostics, communication checks, and first responder training. Additionally, efforts are being made to install and commission the hydrogen fueling unit, which is crucial for the sustainability of the train. The next phase will involve field testing to validate various safety aspects such as station alignments, at-grade crossing engagements, and positive train control. These tests aim to enhance the overall customer experience when the ZEMU is fully integrated into the fleet. Field testing is expected to start in the fall, with plans for a service launch in the upcoming year. This initiative not only focuses on improving public transportation but also highlights the importance of sustainable technology in the transport sector.