Except given American drivers insistence on their own primacy and infallibility on the road, I can’t envision an edge lane working.

The main road closest to my house was recently (3 years ago) re-striped from two lanes each direction to 1 lane + bike lane. Car frequently ignore the bike markings and simply use the bike lane for aggressive passing of vehicles going the speed limit. I damn near got run down from behind by a bro-dozer making one of these aggressive moves in the bike lane.

Too many American drivers are self-entitled wankers, and suburban roads are too wide and too fast, for this to work. (Of course, wide road, no reason for this model, but I suspect American drivers simply wouldn’t tolerate this design)

But, when comparing paint with paint, this will slow drivers down more than the standard divided two car lane two way road they are accustomed to, due to the single center motorized lane that you pointed out.

As a commenter from the Netherlands pointed out somewhere else on this post, this paint only approach is supposed to just be one cost effective tool for very low throughout roads, the lower end of a panoply of system-level methods to design separation between ped, cycle, and car velocities, part of a system that first prioritizes proper cycleways over paint-only methods.

Unfortunately in North America we really have to crawl before we can walk on this one.