Two small tunnels, 250 metres and 180 metres long, will both be constructed at kilometre marker No.29.
A source in the Highways Department, which designed the wildlife corridor, said the agency will need to work closely with the National Parks, Wildlife and Plant Conservation Department to work out how to get wild animals to use the passages.
The corridor was recommended by the World Heritage Committee to help reduce the number of animals killed in road traffic accidents.
The Highways Department is expected to start construction of the project next year and complete it in three years, the source said.