Most of my riding is this, and I think the risk here is perceived risk, not actual. Generally getting smooshed from behind is a low-likelihood event. When it does happen it's on fast trunk roads (pretty nasty to ride, but also usually avoidable).
This looks like another techy boondoggle to reassure people. Cycling is littered with 'em.
I have been in a number of driver at fault cycling collisions. Although I was never hit from behind I have had 3 near misses by cars going over 40 mph. It isn't a low likelihood event.
This looks like another techy boondoggle to reassure people. Cycling is littered with 'em.