Frustrated drivers were taking risks because of congestion, Opposition transport spokesman Ken Travers said.
Mr Travers spoke of photographs published in print and online media showing cars taking to the cycle path on Nicholson Road in Parkwood to avoid queues bound for Canning Vale.
‘The frustration that is leading to silly and dangerous antics on Nicholson Road could be addressed by extending the Thornlie rail line,’ he said.
Transport Minister Troy Buswell said authorities were following up on the reports and transport infrastructure investment was a high priority for the Government during its second term.
‘The Government is working hard to deliver a range of balanced transport outcomes,’ he said.
‘The extension of the Thornlie line to link with the Mandurah line remains a longer-term priority.’
Mr Buswell said a comprehensive bus network operated from Canning Vale to Murdoch, Thornlie and Maddington train stations and since 2008, the Government had expanded bus networks and increased frequencies in Perth, including around Canning Vale.
The Government’s 2011 draft Public Transport for Perth in 2031 plan scheduled a Canning Vale train station for after 2031.
The RAC made a submission saying this created doubt over the project ever starting, and called for acceleration.
The City of Gosnells, Gosnells MLA Chris Tallentire and Southern River MLA Peter Abetz did the same.
In February 2012, a spokesman said the department was reviewing submissions and would report in coming months.
In July 2012, the Government said it was considering new, ‘substantially higher’ southeast corridor population forecasts.
The Comment News has asked for a date on the final plan several times since then, without success.
Most recently, Mr Buswell said the department had now undertaken significant consultation to align with community expectations.