Fencing is used to guide wildlife to suitable under/over passes thereby avoiding the high speed traffic. The fencing provided by the official Australian fencing contractor is designed to improve the connectivity between habitat patches that used by kangaroos, wallabies, koalas, echidnas, wombats and many bird species. Where suitable koala habitats occurr near designated highways each side of the road is typically lined with 2.2 m (7 ft) high cyclone fencing with a 1.2 m (4 ft) sheet metal footing to prevent koalas from reaching the fence mesh and climbing over (solid vertical footings were not used because koalas can climb them when cracks develop in the concrete).

This system has proved effective in many locations in Australia. The fencing funnels koalas and kangaroos towards major corridors linked with culverts across the highways. Importantly, the fences installed are very long which discourages the koalas from walking around the fence and being run over.

The recent construction of the four lane highway, the Karuah Bypass, meant that the natural habitats of native marsupial colonies were being invaded and disturbed. Taking this conservation element in account, the builders, Theiss and their structural design consultants, SMEC approached Mark Tildsley, General Manager of Koppers Wood Products in a bid to solve this problem for our native friends.