Midland MP Michelle Roberts claimed delays to the intersection upgrade caused by Main Roads was risking lives, despite funding for the roadworks sitting in council coffers.
City of Swan chief executive Mike Foley said the council had been awaiting the results of the intersection analysis from Main Roads.
�These were received last week and the City is now examining the results, which will be used as a guide to progress these works,� Mr Foley said.
Mrs Roberts said Black Spot funding for the intersection was agreed to in 2014.
�Main Roads just comes up with delay after delay,� Mrs Roberts said.
A Main Roads spokeswoman said the delays had been caused by analysis of heavy vehicles accessing the roads. However, Mrs Roberts said in a letter to her office in 2012, the same response was given to explain why work had not been not completed at the intersection.
A letter from then minister for transport Troy Buswell�s principal policy advisor Michael Buba to Mrs Roberts stated: �As Farrall Road and Morrison Road are both local roads under the care and control of the Shire of Mundaring and the City of Swan, council is responsible for maintaining safety and managing congestion on these roads�.
Mrs Roberts said she believed that the City of Swan and Shire of Mundaring understood the priority of improving safety at the intersection.
�It�s really important that Main Roads recognise the priority and approve any amended plans at the earliest opportunity,� she said.
�Delays could cost lives or result in avoidable serious injury.
�Unfortunately, the Transport Minister Dean Nalder and his office have been of no assistance in the matter.�
Mr Foley said he expected work on the intersection upgrade would begin soon.