S-Bahn, Stadtbahn, Regionalbahn, Vorortzug, Pendlerzug
regional rail - suburban rail - suburban train - regional train - local train - stopping service
Commuter rail is a passenger rail service that primarily connects suburbs and surrounding regions with a central city. It is designed to handle daily travel for workers, students, and other regular riders, usually during peak morning and evening hours. Trains typically run on fixed schedules, stop at designated stations, and cover longer distances than urban metro or light rail systems, often sharing tracks with freight or intercity trains. Commuter rail helps reduce road congestion, offers an alternative to car-based commuting, and supports regional mobility by providing reliable, higher-capacity transportation between residential areas and major employment centers.