IT'S the proposed highway with a corridor yet to be determined and it has confused and angered many western Sydney residents.
While the Outer Sydney Orbital (M9) planned by the state government has potential to introduce more jobs, more industry and cut travel times, many potentially in its path are less than enthusiastic about the new motorway.
The proposed motorway could run from Wollondilly, via Camden and Penrith, and finish in the north-west and The Hills.
Transport for NSW said the motorway was needed to support Sydney's population, forecast to grow from 4.3 million to 5.6 million people, with an additional 625,000 jobs.
"Greater western Sydney will be home to more than half of Sydney's population," a Transport for NSW spokesman said."To support population and employment growth west of the M7 motorway, a north-south corridor is needed."
The state government has allocated $4.6 million to identify and reserve the corridor.
The spokesman said planning was already under way for the project, but the timing of construction was yet to be determined as were the cost and financing options.
"Studies are currently under way to determine if the project will have any impact on communities, or whether there will be any impact on local properties," he said.
"Transport for NSW will look to minimise negative impacts on existing property."
A Hills Council spokesman welcomed the plan.
"The council supports the concept, but there is no corridor determined and we do not know whether it will run through The Hills local government area," he said.
View the map: hillsnews.com.au.