Orange, Yellow Lines set to meet 400m ahead of airport station
Kolkata: Even as the Metro Yellow Line from Noapara to the airport awaits inspection by the Commission of Railway Safety (CRS) that will pave the way for its commissioning, work is set to commence on the convergence of the New Garia-Airport Orange Line's Up and Down tracks alongside those of the Yellow Line.
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This convergence in a sub-terranian tunnel, which will happen around 400m from the station.
Rail Vikas Nigam Ltd (RVNL), which is implementing the Orange Line, has taken a three-day traffic block on the airport-bound access road. It will dismantle the median divider that separates the two flanks and shift a portion of the airport-bound flank to the other one that leads traffic from the airport to the city. Thereafter, each flank that currently comprises three lanes will be temporarily reduced to two lanes.
Two lanes will then be handed over to RVNL so that it can dig up the ground and execute the seamless convergence of the twin lines into the tunnel leading to the airport station.
"While reinforced concrete boxes are being pushed under the airport road to build the Orange Line tunnel without disturbing the airport traffic, we need around 7.5 m width of the airport-bound flank for the convergence through cut-and-cover method so that the Orange Line tracks converge at the same level as that of the Yellow Line," an official explained.
To undertake the convergence tunnel construction, airport-bound traffic will have to be diverted to the right after exiting the right turn flyover from VIP Road. However, with the airport-bound flank and the one leading out of the airport at different levels, Afcons that is contracted to construct the 900m underground section of the Orange Line has to first level out the two flanks.
"After the two flanks are levelled, around two-third of the flank leading to the airport will be used as the metro construction site," the official said.
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"At the stakeholder meeting, we have asked RVNL and Bidhannagar police to maintain coordination among themselves to ensure passengers coming in and out of the airport are not affected by the metro work outside the airport," Kolkata airport director Pravat Ranjan Beuria said.
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