[bomberjet]

The Cities new pedestrian and cycling core pathways are 4.5m wide. 1.5m of that is for pedestrians (equal to a normal sidewalk), and 3.0m of that is for 2-way cycling. So 1.5m cycling lane each way. There is either a rumble strip or painted line (maybe both) to separate pedestrian and cyclists. That is the standard.

The also have 3.0m wide pathways which are not core routes and is the older standard. Essentially they added a sidewalk width to the bike paths to make it 4.5m.

Of course this is only feasible where you have the space.