Technology: Line No 1 and 3 will have 25 KV AC traction while Line No 2 will have 1500 V DC traction. Continuous automatic signaling systems have been installed along with automatic train supervision as well as the cab signalling system. Rolling stock comprises 3.2 metre wide coaches with eight car train formation (four cars in the initial stages). The consortium of consultants comprises Pacific Consultants International of Japan, Parson Brinkerhoff International of the USA, Japan Railway Technical Services, Tonichi Engineering Consultants of Japan and Rail India Technical and Economic Services. Job contracts have been awarded to a wide range of Indian, Japanese, German, Korean, Swedish, French, Spanish and Australian companies.