You’re assuming that most people are decent law abiding drivers and won’t be impatient and simply use that as another lane or parking spot.
I’m interested in your design of a roundabout with a protected bike lane. Does it have over passes or underpasses?
Can you draw that? How does it work when a bicycle wants to go straight and a car wants to turn right? Either you would need underpasses/overpasses or accept that cars and bikes will constantly cross each other, which in practice means the bikes will be in danger.
They put in protected bike lanes on big street near me. Bike lane-parking-traffic. So many ‘bike allies ‘ saying “it makes me more nervous to drive, I have to look for the cyclists now”.
In a large part of the US at least, it’s never going to be default behavior.
