Part of Sydney's Wakehurst Parkway will be fenced off to wildlife, after 98 wallabies were killed on the road this year.
The new fence, to be announced by Pittwater MP Rob Stokes today, will cover about 450 metres of the worst roadkill area, near the Sydney Academy of Sport.
In the month to July 12, motorists killed 18 swamp wallabies, 12 brushtail possums, eight ringtail possums, three long-nosed bandicoots, a currawong and a brush turkey.
The data was compiled by the Northern Beaches Roadkill Prevention Committee, a volunteer group that has been campaigning for the fence for years.
"Measures to help reduce roadkill aren't just about protecting native wildlife, they're also about protecting motorists from serious accidents," Mr Stokes said.