Premetro (Buenos Aires)
The Premetro, officially Line P, is a 7.4-kilometer-long (4.6 mi) light rail line that runs along the outskirts of Buenos Aires, connecting with the Buenos Aires Underground line E, at Plaza de los Virreyes station and then to General Savio, with a short branch to Centro Cívico. It opened in 1987 and is operated by Emova.