after the works were completed. There have been numerous petitions as well as a campaign by the City Ombudsman to extend services to 1:30 am on weekdays and 3:00 am on Fridays and Saturdays. These proposals have been rejected by Subterráneos de Buenos Aires, which stated in 2015 that the reduced schedule is needed in order to carry out infrastructure modernisation works across all the lines while they are closed. The Subte operations are radio-controlled and monitored remotely from the Metrovías Central Operations Post (PCO in Spanish). There 24 operators have been monitoring four of the six subway lines (lines C and H have separate monitoring) since 2001. As of 2015, last formations arrive at their respective terminals at approximately 11:30 pm, where maintenance and cleaning operations take place until about 4:00 am. Premetro The PreMetro line E2 is a tramway feeding Line E. The Premetro line opened in 1987. It carries approximately 2,300 passengers daily and is also run by Metrovías. In 2015, SBASE began making plans to refurbish and rebuild many of the stations, including a brand-new central terminal, as part of a plan to modernise the network, with the intent of increasing the amount of rolling stock in circulation. By the end of 2015, the Intendente Saguier terminal had been refurbished, though other works on the line were delayed. The Premetro was originally intended to include a number of feeder lines to the Underground network, including a second one to Line E and ones on lines C and D. The Premetro project was largely abandoned since it occurred in Argentina's transition to democracy from the military junta and then the privatisation of the railways, which was a difficult time economically for the country, and only Line E2 was built. New Premetro feeder lines have been proposed in recent years, however, the role of the network has given way to the new Metrobus network which covers many of the same routes originally intended for the Premetro. Urquiza Line Línea Urquiza (in English: Urquiza Line) is a suburban electric commuter rail line originally designed to be part of the Underground system as part of Line B and operated by the Underground operator Metrovías. As a result, it has similar characteristics to Line B, using third rail electrification and standard gauge as opposed to the broad gauge used in the Buenos Aires commuter rail network. It runs from the Federico