The 54 km length of the National Highway (NH) 37 runs almost parallel to the southern boundary of Kaziranga National Park between Bokakhat and Ghorakati. During the monsoon the area inside the park gets flooded and the wild animals cross this highway to move towards the elevated Karbi Anglong hills. In this process many animals are killed by fast and heavy vehicular traffic moving on it almost round the clock. In spite of construction of several corridors and other steps including construction of road signage, terrain easements, rumble strips, road awareness campaigns, intensive night patrolling and regulation of vehicular traffic to mitigate the number of death of wildlife does not seems to be foolproof and effective. There is a lack of necessary and functional corridors for safe passage of animals. There are also plans to convert the existing NH-37 to a six lane expressway. If this expressway is constructed then it may cause a permanent barrier effect and also increase wild animal mortality.