Kaupunkimetro
Kaupunkimetro is a term that can refer to a few different concepts, most commonly relating to urban rapid transit systems, often a metro or subway. In its broadest sense, it translates directly from Finnish as "city metro" or "urban metro." This designation typically applies to a high-capacity, high-frequency rail service operating primarily underground or on elevated tracks within a city or metropolitan area.
The primary purpose of a kaupunkimetro is to provide efficient and rapid public transportation, alleviating road
Specific cities may have their own kaupunkimetro systems. For instance, the Helsinki Metro is a prominent example