Union Urban Development Minister S Jaipal Reddy says Metro rail system in cities like Mumbai and Chennai will be built on Standard Gauge, which is used in most of the new age transport systems in the world. He said the Standard Gauge is cost-effective when comapred to the broad gauge system, which is being used in Delhi Metro so far. <br/><br/>Speaking to reporters after flagging off the country's first Standard Gauge train on DMRC's Inderlok-Mundka route, Mr. Reddy said it was a historic occasion. He said this is the first such kind of a corridor in the country and it is a milestone in the country's metro system. He said since Standard Gauge system is used in 95 of the metro system in the world, the upcoming metro projects in Chennai, Mumbai, Hyderabad and other cities will have Standard Gauge. <br/><br/>Mr. Reddy said that by adopting standard gauge, government can save money and DMRC has told him that it has saved 72 crore rupees on this 15.1 km stretch (Inderlok-Mundka) by adopting this system.<br/><br/>Delhi Chief Minister Sheila Dikshit said with the Phase-II of the DMRC nearing completeion by this year, the DMRC has started preparations for the Phase-III. A Detailed Project Report of the Phase-III is being prepared by the DMRC.