(a) whether the design of a flyover built on the National Highway can be modified
after its construction;
(b) if so, the details thereof along with the details of such flyovers in which such
changes have been made and the procedure followed in this regard;
(c) whether the Government proposes to give the right of modification in a flyover built
on a National Highway to the concerned State; and
(d) if so, the details thereof along with the time by which final decision is likely to
be taken in this regard?