The line is expected to get operational by December 2018.
The giant TBM (Tunnel Boring Machine) broke the fibre reinforced concrete wall & entered AG-DMS station on Wednesday, signalling completion of one of the two tunnels, metro officials said.
An official said,”We now have the other tunnel to complete which is about 450m away from achieving break through. We will complete it by next month.”
Officials said, once the tunnelling under Anna Salai is complete, traffic will be restored to its original by December end after removing the TBM from the site & closing the shafts cut to build the stations.