NHAI posts 56% completion rate across all phases in 2007-08, down from 81% in 2004-05; no dip in spending NHAI blames shortage of staff and raw material NEW DELHI, May 29: The country's biggest infrastructure upgrade under the National Highways Development Programme (NHDP) has recorded the lowest-ever progress rate under this government in 2007-08. The National Highways Authority of India (NHAI) has posted a 56 per cent project completion rate across all phases of the NHDP in 2007-08 in terms of completion of projects