The federal government will spend $8.5 million to change the traffic lines on all Mitchell and Kwinana freeway on-ramps in an effort to improve traffic merging and remove the stigma widely associated with Perth drivers.

The federal government will spend $8.5 million to change the traffic lines on all Mitchell and Kwinana freeway on-ramps in an effort to improve traffic merging and remove the stigma widely associated with Perth drivers.