G'day Guys The new ext is good unfortunately it still doesn't cut out the 20mins it takes to get across Mandurah.
The exit you need is Lakes Rd, it can take you down to where the main drag near Bunnings. alternatively turn left at the first set of lights and follow your nose till Pinjarra rd turn right then left at the main drag again.
Make sure you reduce speed to 80 at the sign on the new hwy outside Mandurah even though you can see why the speed should be reduced, because the speed trap will get you if you don't.
Yep, Green lands rd will get you to the other side at Claudesville, however you will have to wait fro the tides to fill in as the mudflats are dry at the moment