As several instances have been reported in the past of wild animals getting killed while crossing the highways and roads close to national parks, forests or wildlife sanctuaries, the state forest department has made construction of underpasses in future projects mandatory.

Linear projects passing close to Protected Areas, Tiger Reserves, Wildlife Corridors and other such areas will now have underpasses with minimum dimensions of 4 metres width and 3 metres height, and at maximum 2 km apart.