The PFL will extend Roe Highway from the Kwinana Freeway through to Fremantle Port.
The Federal Government has offered $925 million towards the construction of all three sections of the link.
In Perth last week, Prime Minster Malcolm Turnbull told ABC radio that despite some issues, the Federal Government remained supportive of the link.
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READ NOW"The Federal Government's commitment is unchanged," he said. "Major Projects Minister Paul Fletcher has approved $317 million in Federal money to be released towards the full $541 million funding required for sections one and three of the project."
Contracts for section one, a 5km extension from Kwinana Freeway to Stock Road known as Roe 8, are close to being signed and work should begin early next year. But the route for Roe 9, which will link Stock Road to Stirling Bridge, could be a year from being decided.
The Government has also yet to solve issues associated with Stirling Bridge and how trucks will get from there to the port.
Rethink Perth Freight Link co-convenor Kim Dravnieks said the current economic climate meant this was not the time to be building the PFL.
"The Premier wants to build the most expensive above-ground road in Australian history at a time when the state budget is the worst we have seen in years," she said.
"This Government has no financial nous and this project should be the first to be dumped."
Ms Dravnieks said Infrastructure Australia had been provided with information from Regional Development Australia that showed an outer harbour was the way to go.
"It is about time that both the Federal and State Governments stopped dithering and got on with it," she said.
Premier Colin Barnett said Roe 8 would provide a connection to the inner harbour and a future outer harbour so "whatever you might think about harbours, you need Roe 8 regardless".