As National Highways comprise about 2% of the total road length in the country and yet carryover 40% of total traffic, the first and the foremost task mandated to the NHAI is the implementation of NHDP- comprising of the Golden Quadrilateral and North-South & East-West Corridors. In addition to the projects under NHDP, the NHAI is also currently responsible for about 1 ,000 km of Highways connecting major Ports & also on National Highways 8A, 24, 6, 45 & 27. Highways length with NHAI currently is around 14,162 km.
The main components of NHDP include:

(a) Golden Quadrilateral (GQ)
Length :- 5846 km
Connecting Delhi, Kolkata, Chennai and Mumbai

Scheduled for substantial completion by 2003 
(earlier it was 2004).

(b) North-South & East-West Corridors
Length :-7 ,300 km 
Kashmir to Kanyakumari -4000 km (with a spur to Cochin) and Silchar to Porbandar- 3300 km.

Scheduled for completion by 2007 
(earlier it was 2009).

Total length of NS & EW Corridors has been taken around 7,300 km. Alignment finalization is in progress.
Staus of NHDP & Other NHAI Projects 
Advantages of having a well developed network of world class highways are many for a nation like India -poised to surge ahead.
NHDP Building World Class Highways
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