First, all gotta realize it's not JUST motocyclists. From pedestrians all the way to train and buildings, car drivers will hit'em.
Equipment changes may mitigate some accidents but it's the people who need to change/progress.
So, to FIX the problems requires a multi-pronged approach:
Better cars (no blind spots would be good);
Better bikes (lots of suggestions in this thread);
Better motocyclists (move'em thru edumication and practice, up from just riders);
Better drivers (good luck with that, car drivers been running into each other since there were two cars).
Incremental improvments are the best we can hope for.
License Requirements:
In school or 18 to get a license, don't license young drop outs (already happening some places.)
Tiered license for motorcycle and car. For instance, no passengers (bikes or cars) 'til 18.
Loss of license until 18 for any infraction.
(I would like to see)
...Mandatory motorcycle training for all new DRIVERS!
...Mandatory retesting
behind the wheel at, say, 10 year intervals. (Currently, in AZ yur first license is good 'til age 65!!)
Education:
(Presume everyone with a license is an adult or should be.)
Adult education happens in four levels, so...
1.
Awareness - Ya gotta put the facts in front of'em. Little learning happens at this level, it's all, like, "Yeah, whatever". It's what people get now on pretty much every subject.
2.
Knowledge - Actually being able to talk intelligently about a subject. These are the folks who can actually pass a written test. Doesn't mean they can GET IT tho.
3.
Transfer - Where the real learning happens: Why Is This Important To ME!!!! This is where the real learning happens. For motocyclists, it's when they realize it can be fun, when learning counter-steering really works, when realizing good maintenance can make the riding better. In other words, when "they" realize they wanna be better. (Same holds true for any subject, music being a great example. Can ya imagine Jimmy Hendrix saying, "Yeah, whatever" about his guitar??
4.
Practice, practice, practice - Thing is, all the practice in the world won't make IT happen without the transfer. Also, for practice to help, ya need effective coaching. (Keith Code style.) And this is where the campaign with cage drivers will fail. They will never "get it" unless they, too, are riders. Or know a rider. Or recognize a famous rider. There's no "transfer" unless they care. And for the most part, they don't care. How to make'em care becomes the issue.
(If you've read this far, sorry. JUST education won't help. Fact is, most folks can do it properly already if ya hold a gun to their head. They KNOW how to drive safely, just too lazy to do it.)
With all that, I've had an idea for a long time for a national campaign to link famous riders with local riders. "Who do you know who rides?" With a pic of, say, Jay Leno, plus a locally recognized celebrity/politician/teacher/etc. I have no idea to make anything like that happen.
One of the best ways to make Joe/Jane Average aware is if someone in their family rides. Problem with that, often the family rider is also not aware, never made the transfer from rider to motocyclist. So the awareness Joe has is, "Yeah, my mother/father/son/daughter/cousin/uncle/aunt got a killed on a bike, I think we should ban them completely."
Some of the ads which have been linked here, from Europe or Canada or Australia won't be effective here, again because of awareness. Folks who already don't care can't be made to care by sticking facts in front of their face. See #1 above. I like the ads, but I'm already a motocyclist.
Never ending battle.