Bicycle infrastructure that violates the rules of safe movement is unsafe by definition. It doesn’t matter how much pretty green paint or fancy yellow reflectors you use. Take a look this from Boston University:
Never mind for a moment that what we see here is a door-zone bicycle lane. Take a look at that green paint. Let’s call it the death zone.
That green lane puts bicycles directly into danger from right-turning and left-turning traffic (assuming this treatment on a 2-way street). Right-turning motorists are expected to look in an unnatural direction for traffic that should not be on the right in the first place. A right-turning motorist’s attention should be focused on the turn and what is in the direct line of the vehicle — not what is behind them to the right.
Bicyclists are also in danger from left-turning traffic (if the graphic showed this treatment on a 2-way street) because they may become blocked from view by through traffic on their left.
In short, that green lane is exactly where bicyclists should not be.
And yet this is offered as a way to keep bicyclists safe.
The problem as I see it: There are a lot of people out there — planners, engineers, bicycle advocates — who frankly haven’t the first clue what they are doing. They are functionally stupid.