Right! Here we only have these green signs, which are purely informational: they indicate the recommended road route for bicycles, but give them no special powers or privileges (by law bicycles are already allowed anywhere they are not prohibited), and definitely do not ban cars on that road.

Even worse are these "share the road" signs, which are also purely informational, but yellow. They somehow manage to both wrongly imply that bicyclists are not allowed to use other roads without these signs, and that sharing the road involves the bicyclist "getting the fuck out of the way" to the side.

Finally this is what my local dedicated bicycle path looks like, after the city finally installed concrete barriers to block it. Before them, car drivers making the turn at the several T-intersections on the boulevard running alongside kept taking their turns too wide (sometimes jumping the curb or sometimes entering through a driveway) and driving on the bike path by mistake as if it were another highway lane.