2 underpasses are not a good solution. 2 underpasses will increase traffic at the intersection. They should consider demolishing the existing overpass (NH544) and using that slot for the NH 66 overpass.
The underpass construction will mske toomuch head ache to proceed with the work because toomuch of cables, pipe lines and the existing flyover pile foundations may obstruct .
Hopeless. Already DMRC spoiled by constructing a flyover along the metro line which always remain free and all traffic is under the bridge. If the underpass is 8-10 lane with separate lanes to enter/exit malls and separate to move other direction then to some good extent traffic can be eliminated.