The pictures below show what I am referring to as"box drains" under construction, on the east side of the road between Egipura jn and the bridge over the strorm-water (rather sewage) drain, in Koramangala.
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MRVC for Mumbai, When will Bangalore see the SPV and running of Suburban Rail Project
MRVC Chief made presentation in Urban Mobility during Dec'2012
http://www.urbanmobilityindia.in/Upload/Conference/920d5229-b4b9-4987-8836-0b131d50a014.pdf