I think what would work better than mirrors are CCTV, that stuff is getting cheaper all the time, smaller and less energy hungry. I would rather look at a display on my bars than use the mirror. What I don't like about the mirrors is the differential focal length. And over time. CCTV would do more to get the attention of potential hit and run drivers than anything else I can think of. A lot of truck use some kind of RFI technology for tolls and taxes. There ought to be a way to collect that kind of info also. We don't need that all the time, but on heavy sections it might help. Right now, you hit a cyclist and you are anonymous or forgiven.