Find the word definition

Wiktionary
commuter rail

n. A railway dedicated to transporting workers to distant job centers far from the city center.

Wikipedia
Commuter rail

Commuter rail, also called suburban rail, is a passenger rail transport service that primarily operates between a city centre, and the middle to outer suburbs beyond 15 km (10 miles) and commuter towns or other locations that draw large numbers of commuters—people who travel on a daily basis. Trains operate following a schedule, at speeds varying from 50 to 200 km/h (30 to 125 mph). Distance charges or zone pricing may be used.

Non-English names include Treno suburbano in Italian, Cercanías in Spanish, Rodalies in Catalan, Proastiakos in Greek, S-Bahn in German (although Regionalbahn or stopping services occasionally also operate as commuter trains), Train de banlieue in French, Příměstský vlak or Esko in Czech, Elektrichka in Russian, ''Pociąg podmiejski '' in Polish and Pendeltåg in Swedish. The development of commuter rail services has become popular today, with the increased public awareness of congestion, dependence on fossil fuels, and other environmental issues, as well as the rising costs of owning, operating and parking automobiles.