You can literally add separated light rail in the center and bike lanes next to the sidewalk and there would still be two car lanes left, one for each direction.
What about areas where buildings are too close to the street to allow this?
This street is too narrow to add a dedicated sidewalk, right?
Which is why the blue square sign is there: The speed limit on this street is walking pace and pedestrians have priority on the entire road.
Therefore: Put bicycle lanes wherever possible, reduce the speed limit where it isn’t.
You can literally add separated light rail in the center and bike lanes next to the sidewalk and there would still be two car lanes left, one for each direction.
This street is too narrow to add a dedicated sidewalk, right?
Which is why the blue square sign is there: The speed limit on this street is walking pace and pedestrians have priority on the entire road.
Therefore: Put bicycle lanes wherever possible, reduce the speed limit where it isn’t.