The term COMMUTER LINE can be summarized as a RAIL line used for transportation of commuters. It is a public transport system that is usually operated by a government agency or a private company. It is designed to provide efficient and affordable transportation for people who travel to and from work on a daily basis. The RAIL line typically runs between two or more cities, towns, or suburbs, and it is often used by people who live in the suburbs and commute to the city for work.