south above the hustle and bustle of Rizal and Taft Avenues along grade-separated concrete viaducts allowing exclusive right-of-way before ending in Baclaran. A three-station east–west extension along Epifanio de los Santos Avenue that will connect Monumento to the North Avenue station was opened in 2010, although the common station is still under construction. Including the extension's two recently opened stations, Balintawak and Roosevelt, Line 1 has twenty stations. Line 2 consists of thirteen stations in a general east–west direction over of mostly elevated track, with one station lying underground. Commencing in Recto, the line follows a corridor defined by Claro M. Recto and Legarda Avenues, Ramon Magsaysay and Aurora Boulevard, and the Marikina-Infanta Highway before reaching the other end of the line at Antipolo. The system passes through the cities of Caloocan, Manila, Marikina, Pasay, Pasig, Quezon City, and San Juan. During peak hours, Line 1 fields 30 trains at most; the time interval between the departure of one and the arrival of another, called headway, is a minimum of 3–4 minutes. On January 9, 2009, Line 1 fielded 31 trains with a headway of 2 minutes to service devotees in celebration of the Feast of the Black Nazarene. Line 2 on the other hand, runs 10 trains at most with a minimum headway of 5 minutes. With the proper upgrades, the Yellow Line is designed to potentially run with headway as low as 1.5 minutes. Line 2 can run with headway as low as 2 minutes with throughput of up to 60,000 passengers per hour per direction (pphpd). In conjunction with the Line 3—also known as the new Yellow Line, a similar but separate metro rail system operated by the private Metro Rail Transit Corporation (MRTC)—the system provides the platform for the vast majority of rail travel in the Metro Manila area. Together with the PNR, the three constitute the SRTS. Recto and Doroteo Jose serve as the sole interchange between both lines of the LRTA. Araneta Center-Cubao and EDSA stations serve as interchanges between the LRTA and the MRTC networks. To transfer lines, passengers will need to exit from the station they are in then pass through covered walkways connecting the stations. Blumentritt station meanwhile is immediately above its PNR counterpart. Baclaran, Central Terminal, and Monumento are Line 1's three terminal stations; Recto, Araneta Center-Cubao, and Antipolo are the terminal stations on Line 2. All of them are