In South Korea they have built bike only roads along most of the major rivers, and in many cases installed bike lanes on a lot of roads. The river paths are ok if you like to ride slow and dodge 10,000 other bikes and people. The bike lanes I like EXCEPT that they are used as parking, shop display space, loading zones, and they tend to do odd things through intersections. I almost got wiped out by a driver on a 'protected' bike lane as they simply crossed the lane without looking - bikes don't register.

Good idea? For sure, but at least here in Korea enforcement of the rules would make them actually useful.