A local line is typically referred to as a railway, train, or transit system that operates within a specific city or region. Other synonyms for this term may include a commuter line, suburban rail, or urban transport. A local line may also be associated with a subway or metro system, light rail, or streetcar service. Essentially, any mode of transportation that serves a localized area can be considered a local line. It's essential to understand these synonyms to avoid confusion when describing transportation methods or navigating a new city, especially when looking for reliable and convenient transportation options.