Updated On: 03 September, 2022 09:10 AM IST | Mumbai | Rajendra B. Aklekar
The Diamond Quadrilateral project is to connect four mega cities of India, viz. Delhi, Mumbai, Kolkata and Chennai, similar to the Golden Quadrilateral highway system

Indian Railways complete doubling, electrification in Mumbai-Chennai sector
Over 150 years since the two cities of Mumbai and Chennai were first linked up by railway, the lines have been consolidated, upgraded and electrified. The Indian Railways has now announced the completion of the Mumbai-Chennai doubling and electrification, which will not only increase the number of trains in the Mumbai-Chennai sector but also add to speed, cutting down journey time.
Latest in the works, a second line in the last segment of the 27-km Washimbe-Bhigwan section in the Solapur division of the Central Railway was commissioned.