Motorists' Right Turns in M'bourne

When I was in M'bourne in the late '80s, I remember that there
was a very odd (to me) arrangement for motorists turning right
across tramlines at signaled intersections. I didn't have a car for
my visit so I didn't have to learn how it worked.

1. Would someone please explain how it works?

2. Is it still being used?

3. Did any other tram cities in the "keep left" world use it?

Thanks.




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