Nagpur: Mahametro has started the internal trial run for Metro operations on the 5.8 km at grade stretch from Mihan depot to south of airport . A team from Research Designs and Standards Organization (RDSO), Lucknow, will come to the city to review the preparations around September 10. A larger team will then reach here to conduct the trial run itself. A source in Mahametro said that track laying on the at grade stretch had been completed. "Track testing will be started soon to meet RDSO"s norms. All the electrical masts for supplying power to the trains have been installed. Currently, testing of the power traction system is being done," he added. The source further said that Mahametro had sought seven approvals from RDSO. "We have received five of them—schedule of dimensions, design basis report (stations), design basis report (viaduct), track fastening system and signalling and telecommunication. The ones for track and traction are expected soon. In spite o...