National Highways Authority of India (NHAI)
The National Highways Authority of India was constituted on 15 July 1989 under section 3(1) of the the National Highways Authority of India Act, 1988 mainly to survey, develop, maintain and manage the National Highways of India. NHAI is a nodal agency of the Ministry of Road Transport and Highways. The National Highways Development Project (NHDP) is, a project to upgrade highways in India to a higher standard, managed by NHAI. NHAI also helps in implementing Special Accelerated Road Development Programme for North Eastern Region (SARDP-NE) for upgrading National Highways connecting state capitals to 2 lanes or 4 lanes in north eastern region.