. . "400000"^^ . "23"^^ . . "1"^^ . . "M1 Yenikap\u0131-Atat\u00FCrk Airport/Kirazl\u0131"@en . "(\u0130stanbul Hafif Metro)"@en . "750.0"^^ . "105"^^ . "M1, officially referred to as M1 Yenikap\u0131-Atat\u00FCrk Airport/Kirazl\u0131, (also known as the Istanbul Light Metro (Turkish: Hafif Metro)) is a rapid transit line of the Istanbul Metro. Opened in 1989, it was the first rapid transit line in Istanbul and Turkey and its opening started the revival of mass-transit in Turkish cities. The M1 consists of two separate train services, the M1A and M1B."@en .