The former is a driver education and training problem

I don't agree. Education and training can help and I do think they're a good idea. But fundamentally, they're not addressing the root cause of the problem, they're just a bandaid. The real fix is better road design. In cities, for example, clearly separating roads with a movement function from streets with a destination function, instead of the constant overuse of stroads that permeates our entire country's urban planning at present. It also means separated bike paths (which are actually not relevant in this post, because high-speed bunch rides belong on roads, not bike paths, but I'll bring it up because the conversation seems to have veered in a more generic direction) with raised priority crossings at intersections, offset from the road to provide maximum visibility. And yes, separated paths for bikes are also needed on inter-city routes.