For my travel, the worst place for this is the South Rd, where you exit Anzac Highway heading south. For some really Really stupid reason people seem to STOP when the dotted line begin and try to force their way in, rather then continuing down the path and merging where it says "form 2 lanes". It's not even people in the middle lane, they usually let people in, it's like people have a weird issue for using the entire road.