The highway passes through dense forests of Western ghats of India. The NH-766 passes through Bandipur National Park and other reserve forests. The rapid rise in traffic of vehicles (Automobiles) in this highway has led to deaths of wild animals due to the speeding traffic, even though vehicles are not allowed from 9 P.M to 6 A.M in some stretches.
The section of the road from Lakkidi in Wayanad to Adivaram (Thamarassery) called as Wayanad Churam (A hill highway with nine hairpin bends) offers a scenic drive.
... in Gundlupet by environmentalists, against proposals to ease restrictions on NH 766, which cuts through the ecologically sensitive Bandipur Tiger Reserve on the borders of Karnataka and Kerala.