GE will deploy its Tempo CBTC solution and computer-based interlocking (CBI) systems for Singapore's sixth and seventh metro lines and will be responsible for design, manufacturing, supply, installation, testing and commissioning of the signalling system and platform screen doors for both lines. The project will be rolled out in three phases with the first set to conclude in 2019.\r\nThe 30km entirely-underground north-south Thomson Line is expected to be completed in 2021 and will feature 22 stations including six interchanges with Singapore's existing metro network at Woodlands, Caldecott, Stevens, Orchard, Outram Park, and Marina Bay. It will feed into the 21km, 12-station Eastern Region Line, which will terminate at Changi, with LTA set to announce further details of the project in due course.\r\nSingapore Technologies Electronics has secured the $S 124m communications contract, which comprises the communications backbone network, digital trunked radio, video surveillance, public address, telephone and passenger information systems.\r\nLTA has also awarded RSEA Engineering, a joint venture of Eng Lee Engineering and Wai Fong Construction, a $S 207m contract for the construction of the Thomson Line's Mt Pleasant station as well as associated tunnels. Daewoo Engineering Construction has secured a $S 441m contract for Stevens station and its tunnels, which will be the interchange between the Thomson and Downtown lines, while Hock Lian Seng infrastructure has won the $S 222m Maxwell station and tunnel contract. Construction of all three stations will commence in the second quarter of 2014 and be completed in 2021.