Underground, subway and metro are common names for a form of mass transit public transport system employing trains. In many cases, at least a portion of the rails are placed in tunnels dug beneath the surface of a city. ^* Many systems combine Metro with other types of transit. See: Category:Intermodal transportation authorities

Public transport | Passenger rail transport | Subterranea

Катэгорыя:Мэтрапалітэны | Категория:Метро | Categoria:Xarxes de metro | Kategorie:Metro | Kategorie:U-Bahn | Categoría:Ferrocarriles metropolitanos | Kategorio:Metropoliteno | Catégorie:Métro | 분류:도시 철도 | Categoria:Metropolitane | קטגוריה:רכבות תחתית | Categorie:Metro | Category:各国の地下鉄 | Kategori:Undergrunnsbane | Kategoria:Metro | Categoria:Metropolitanos | Categorie:Sisteme de metrou | Категория:Метрополитен | Категорија:Метро | Kategori:Tunnelbanesystem | Категорія:Метро | Category:地铁