The National Highways Authority of India was constituted by an act of Parliament, in 1988 and is responsible for the development, maintenance and management of National Highways in India.
NHAI website has details about Indian Road network, national highways, National Highways Development Project or NHDP, NHDP Maps, Golden Quadrilateral, NH2 Delhi-Kolkata, NH4 Chennai-Mumbai, NH5 Kolkata-Chennai, Nh8 Delhi-Mumbai, port connectivity map, NSEW corridors, tenders, NHAI bonds, e-tenders, NHAI on facebook etc
National Highways Authority of India,
G 5&6, Sector-10, Dwarka,
New Delhi - 110 075
Phone: 91-011-25074100 & 25074200
Fax : 91-011-25093507, 25093514
Web : http://nhai.org/