The Janakpuri-West Botanical Garden Corridor, which is currently under construction under the phase three of the Delhi Metro has chalked out an ambitious plans to maneuver two major engineering challenges of crossing over the two crowded Delhi-Mumbai railway line and two loops of the congested Modi Mill flyover in Okhla and Ishwar Nagar Metro stations, which are being set up at a distance of about a km from each other. As the alignment of the corridor is passing along the Modi Mill flyover, the area available to the engineers for constructing the viaduct is also very narrow. Despite such space constraints, the Modi Mill flyover has been kept entirely available for traffic, said an official spokesperson of the DMRC adding that in order to cross the railway corridor, which consists of five tracks, Delhi Metro Rail Corporation (DMRC) is planning to install a steel bridge because it will cause minimal disruption to the railway operations below.

Elaborating further he said adding that the bridge, which will be an engineering marvel, will cross the tracks at a height of about 17 metres. After crossing the railway tracks, the viaduct will also pass over two loops of the Modi Mill flyover which lead to the two sides of the Mathura Road below towards Ashram and Badarpur. The bridge building work over both these crucial loops will be carried out without causing any disruption to the flow of traffic below. The length of the span crossing over the first loop towards Ashram will be 34 metres, the length of the span over the second loop towards Badarpur will be 37 metres. Segmental launching technology will be used for carrying out construction on the stretch wherein the viaduct will come up at both the locations at a height of 17 metres. As of now, work on the construction of the piers near the flyover are almost over, the launching girder to be used for initiating the segment is currently underway. The entire length of the corridor is 36.5 km with 24 stations and construction of the viaduct over two loops of Modi Mill flyover is expected to be completed by the end of October and construction work on the entire corridor is expected to be completed by the end of 2016.