nagpur during his visit to city on december 11 prime minister narendra modi will also inaugurate remaining routes of metro phase i from kasturchand park to automotive square line 1 and jhansi rani square to prajapati nagar line 2 with this metro route on indias first fourlevel transportation corridor located at the gaddigodam railway crossing will be opened on line 1 the fourlevel transportation corridor is a unique structure which is a part of asias longest doubledecker viaduct spanning 53km constructed by afcons for mahametro and national highways authority of india nhai only the metro rail part of the viaduct will be inaugurated while nhais flyover is yet to be completed mahametro managing director brijesh dixit told toi already mahametros doubledecker viaduct of 314km on wardha road has entered the guinness book of world records as the longest on any metro rail system it was commissioned on march 5 2019 for metro rail and on november 13 2020 for the highway mahametro spokesperson akhilesh halve said following the same pattern the metro route on the fourlevel transportation corridor will be started first and the road below later after completion of all the worksa senior afcons officer told toi that after completion the 53km doubledecker viaduct would create a world record by overtaking the wardha road viaductstarting from lic square the 53km doubledecker viaduct ends at automotive square the fourlevel transportation corridor is formed out of an 189 metre wide steel girder launched across railway tracks at a height of 28 metre from the ground levelsuch unique multilevel transportation network is the firstof its kind in the country an existing vehicular and pedestrian underpass forms the bottom most level railway tracks above it form the second level the national highway and the metro line will form the third and fourth levels respectively as per afconsthe company had erected this 80 metre doubledecker steel span weighing 1650mt in a record time of two months the steel superstructure was placed over the gaddigodam railway crossing from where more than 150 trains and over one lakh vehicles passed the construction site every day the doubledecker open web girder owg which was created with 1650mt structural steel with 8000 structural elements was placed over the busy gaddigodam railway crossing last winter all the activities were done in extremely tight railway block hours given how busy this route is such a critical and complex task has never been attempted before in india afcons project manager arun kumar said