Why can't they upgrade the existing NH-4(via Kolar) instead of building this one? And upgrade the Krishnagiri route to a 6 lane.
In fact the road is quite bad,is what I hear, between Sriperambudur and Chennai.
I am not really convinced for a 3rd highway between Chennai and Bangalore. Frequent travelers/business people will just use the flight. You are going to get stuck anyway on the highway in the last mile(read Sriperambudur-Chennai) and the same is the case at the other end as well currently(Hosur-Bangalore). Not sure how the last mile problem will be solved via this highway.