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While corridors 3 and 5 will have seven interchange stations each, the corridor 4 will have three interchange stations. *There will be as many as 16 interchange stations in this phase, making commute between different lines easy. *The first corridor will run via Padi, Valasaravakkam and Medavakkam second corridor will touch areas such as Kodambakkam and Luz and the third corridor will pass through Perambur, Luz, Adyar and ECR. The work on corridors 3 and 4 will start this year. *The corridors are Madhavaram Milk Colony to SIPCOT (44.3 km) CMBT to Light House (15.7 km) and Madhavaram Milk Colony to Sholinganallur (44.6 km). *Phase-II of the project will have three corridors and will run 189 kilometres covering 124 stations. Here are some key facts about the proposed Phase-II of Chennai Metro Rail Project: The project is a part of the seven lines that were planned by the Delhi Metro Rail Corporation (DMRC) for the city. The Chennai Metro announced the second phase of the rapid transit system in December 2016. On the other hand, an additional extension of the Blue Line towards Wimco Nagar, which was proposed and approved in December 2015, will be operational by 2022. This phase, which was initially proposed, is likely to be completed in 2019.
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A 45-km phase, the Blue Line runs between Wimco Nagar and the Chennai International Airport while the Green Line connects Chennai Central with St. Phase-I of the Chennai Metro has two lines – the Blue Line and the Green Line.