Tata Projects secured a 12.0487 billion contract from CMRL to build four underground stations, situated at Otteri, Pattalam, Perambur Barracks, and Kellys, as part of the phase-2 project. The agreement was signed, with T Archunan, director (projects) of CMRL, and Raman Kapil, executive vice president of Tata Projects, formalising the deal.