rapid transit
US /ˌræp.ɪd ˈtræn.zɪt/
UK /ˌræp.ɪd ˈtræn.zɪt/

1.
trasporto rapido, metropolitana, ferrovia urbana
a system of public transportation in a city, usually consisting of trains that move quickly on a special track, often underground or above ground on elevated tracks
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Many large cities rely on rapid transit systems to move commuters efficiently.
Molte grandi città si affidano a sistemi di trasporto rapido per spostare i pendolari in modo efficiente.
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The new rapid transit line will significantly reduce travel time across the city.
La nuova linea di trasporto rapido ridurrà significativamente il tempo di viaggio attraverso la città.