Infrastructure very often distrupt nature. To protect elephants\ 131km (km) Pekanbaru-Dumai (Permai) toll road has 6 elephant crossing tunnels.
https://kumparan.com/kumparanbisnis/tol-pertama-di-ri-yang-miliki-terowongan-gajah-segera-beroperasi-1thTHAeRQoc/full