rolling stock, including 14 trains of 6 cars each. The network would use the Trainguard MT CBTC technology, which had already been implemented on line 1 and line 14 of the Paris Métro. System With a length of , the first section of Line 1 to open included ten stations, connecting Tafourah–Grande Poste to Haï El Badr. Nine of the ten stations are underground with two central tracks flanked by two long side platforms. Only the Haï El Badr terminus station is on the surface and it has three tracks and two island platforms. The El Hamma - Haï El Badr section, with its 4 stations and 17 other works for ventilation and cables was carried out within 38 months. Civil engineering work and rail laying were officially completed on 30 June 2007. The installation and the welding of of tracks were started in April 2007 by the French company South-western Travaux France (TSO) with the first metro car to be delivered to Algiers by December 2007. In July 2015, this was supplemented by the opening of the , four-station expansion from "Haï el Badr" to "El Harrach Centre". The system now serves 14 stations, over a total route length of approximately . Stations Operations The total cost of the first phase of line 1 rose to 77 billion DZD (900 million euros), consisting of DZD 30 billion for civil engineering and DZD 47 billion for the equipment. 14 six-car trains are being used. Each train is 108m in length with 208 seats and can transport 1,216 people. The metro line can move 41,000 passengers per hour, the equivalent of 150 million passengers per year, with a headway of under 2 minutes. Trains can travel at speeds of up to , and the line is open from 5 a.m. to 11 p.m. The metro's daily operation is the responsibility of the RATP Group, which was awarded the contract in August 2007. Extensions Invitations to tender were launched for the construction of a section between Bachdjarrah and El Harrach composed of 4 stations and one viaduct above the access road to the Ouchaïah Wadi motorway. It opened for public service on 4 July 2015. The Gaama group which carried out the first section quoted 250 million euros including the construction of a multimodal station (subway/train/taxis) at the El Harrach railway station. Two other extensions to Line 1 had a planned public