NHAI is targeting 1,000 wayside amenities over the next five years--one at every 50 km along national highways--against 600 envisioned earlier in partnership with the private sector, a senior government official told ET. "Of these, 800 will be developed under the public-private-partnership (PPP) mode, wherein NHAI will provide the land and all requisite permissions along with supervision while the private player will be responsible for development, operation and maintenance of the facility for 15-30 years," the official added.