Here's an example of a Separated ("Protected Bike Lane") Bikeway shown in Washington D.C., maybe safer from motor vehicle crashes but unsafe and ineffective for normal bicycle commute speeds. Dumbing down, narrowing, requiring zigzag slaloming, etc. isn't improving bicycling but some advocates claim this kind of facility does encourage some new riders. IMO this reduces the effectiveness of using a bicycle for transportation; they just keep us out of the way of motorists.
Wow! How truly efficient and obviously a relaxing experience.... NOT. The epitome of car dominated