[2] The Bukit Timah Expressway severed the connection, leading to a number of negative impacts to the wildlife living in those reserves.

[3] Eco-Link@BKE was intended to address these issues by creating a safe crossing between the reserves, and allowing expansion of the animals' habitats and gene pools.

[2] There is a fence on the bridge to prevent certain large animals such as sambar deer and wild boar from crossing into Bukit Timah, which is too small and fragile to sustain them.

[3][6][7] Authorities hope that when the trees mature, Raffles' banded langur monkeys will use the Eco-Link to expand their range into Bukit Timah.

Because Singapore is not just about concrete, or steel, or glass, or roads, or buildings, it is also about the green spaces that we work very hard and pro-actively to cherish, to protect, and more importantly, to enhance.”[7] With the first Eco-Link deemed a success for Singaporean wildlife, the country has decided to build a second Eco-Link structure, known as the Mandai Wildlife Bridge, over Mandai Lake Road.

Located close to the Singapore Zoo as well as being a part of the wider Mandai Wildlife Reserve, construction works commenced in June 2017, and the bridge opened on 6 December 2019.

The bridge is also much longer at 140 metres (460 ft) and connects the vegetated areas of the Central Catchment Nature Reserve on either side of the road.