hmm. it is built difficult though but if it is taken up, it wud surely be a benefit.
actually there is mighty river Ganga which would require construction involving huge investment on the same and jacketing on pillars of old bridge.
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the current bridge is in dilapidated condition is said to be oldest functional bridge in India and 2nd oldest built bridge in...
more... India. (1st oldest ganga bridge in old is abandoned)
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there have been talks of quadruple of LKO CNB track. 4 line entry/exit for LKO has been planed
similarly, 4 line entry/exit for CNB towards LKO end wud help a lot too.