>>1057779A 21.5km long third line (northwest-southeast) is currently under construction. Line 3 is labelled as light rail but will use Alstom Metropolis (metro trainsets) as rolling stock. The trains will use pantographs. Completion is expected sometime in 2017.
Testing of Alstom Metropolis:
https://www.youtube.com/watch?v=hv1uNkTW9SE