Melbourne tramways road markings

I've been trying to figure out the meanings of the road markings that
appear between the rails around Melbourne's tram network. Can anyone
help me with their meanings?

I've noticed all sorts of lines, shapes and colours and cant figure
them all out. The ones I've seen and my best guess at their meanings
are below.

Double Yellow line full-width: Stop! terminus or intersection.

Single Yellow line full-width: Clearance point for trams entering
from adjacent track (eg crossover etc).

Single Yellow line helf-width left side: Clearance point for
point/crossover in rear for non-articulated cars.

Double Yellow line half-width left side: Clearance point for
point/cossover in rear for articulated cars.

Single White line full-width - No idea

One Yellow Circlular disc, followed bay two yellow discs a few metres
later - dont know - is it something to do with overhead power?

One Yellow triangle followed by two yellow triangles a few metres
later - ditto above.

I have also seen three discs at some places, and I dont think they are
always associated with preceding single and double discs.

White Cross - the entire width of the track - Dont ever stop here -
remotely operated catch-points (eg at rail crossings).




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