I think technically it is an advisory lane , as it is entirely within Class G airspace , however , as there are both North and South routings as documented on the Sydney VTC , I think it would be pretty stupid to fly on reciprocal headings to those shown . There are numerous both way low level lanes though , the V1 lane off the coast of Sydney is one such example . I have flown the Bankstown lane of entry a few times , always as per the ERSA , never see any opposite direction traffic , but always aware , and maintain a good VFR lookout .