Overview

• The ZEMU entered passenger service on Sept. 13 after roughly ten months of local testing.
• The train operates on the 9‑mile Arrow route between downtown San Bernardino and the University of Redlands, connecting to Metrolink’s San Bernardino Line.
• Built in Switzerland by Stadler, the unit uses hydrogen fuel‑cell and battery power with only water vapor as its emission.
• Saturday’s debut is the first of three trains planned at about $23 million each, with contract options for additional units.
• For now, the zero‑emission train runs alongside existing diesel multiple units, with inaugural rides offered free on Saturday.