That was me.
In May of 1967 (day after memorial Day) I was broadsided on my way to work by a car who 'didn't see me'. I was on a Main Street, had the right of way, and wasn't speeding -- them BAM! This guy blew through from a side street.
I went flying, about 20 feet in the air, with my right ankle and some foot bones smashed, and my helmet scratched to hell from the landing (it kept me alive). I still have a 2½" screw through my ankle which was needed to hold all the little bones together. It seems like I was in a cast forever.
(if I slightly bump it, it still hurts like hell. Cowboy boots help prevent that)
I think scientists should work on something that creates an image that people WILL see. Be it from a small holo projector or some form of outerwear that has a device that triggers a mental stimuli.
I own two bikes, but instead of installing super bright high beams on them I use those obnoxious blue HID lamp kits.
Another thing that helps is to have an antenna on your bike. make it look as if your bike from a distance may be a Highway Patrol bike, I even have a project that flashes a couple of red lasers hidden in my tailights that for a micro second flashes very brightly at a person behind me.
I think the real trick to Mark 1 invisibility is an optical light frequency that actually turns off the brain, much like some Japanese cartoon flashing lights.