Comment by caf

No, the roundabout rule is that a vehicle entering a roundabout must give way to any vehicle already on the roundabout, or a tram that is entering or approaching the roundabout.

See the Australian Road Rules, Part 9: https://www.pcc.gov.au/uniform/Australian-Road-Rules-19March...

If you are approaching the roundabout and someone enters it from your left before you get there, you have to give way to them.