CAF, Spain, will supply 115 cars for the new 22.1km Line 3 and 70 cars for Line 6 which will be 15.3km long, while Thales will install CBTC to allow the automatic operation of both lines. This part of the contract is worth $US 336.45m while the train maintenance contract makes up the remaining $19.1m.

Each car will be able to accommodate 260 passengers. Trains will be air-conditioned, and fitted with a passenger information system and CCTV.

CAF and Thales say their offer received the highest number of points in the technical evaluation of the bids. The other bidders were Alstom, the Rápido 63 consortium of Hyundai and Ansaldo STS, a Japanese consortium of Hitachi and Mitsubishi, and Siemens.