That's an interesting idea! But I'm not sure such a system is feasible. Judging by historical bike registration programs, the realistic implementation of such

That's an interesting idea! But I'm not sure such a system is feasible. Judging by historical bike registration programs, the realistic implementation of such a system would be expensive, underachieving, and offer noteworthy levels of customer disservice. No one would accept the idea of a bike registration fee over ~$5, meaning the system would not be self-funded. Identification would probably be easily counterfeited. Bikes lacking identification would be ignored. Technically speaking, what ID would be visible to traffic cameras? A giant QR code fairing over the front wheel? Bikes come in many shapes and sizes so it's not as simple as a license plate. About the only guarantee you have is that it has at least one wheel that is at least 10" in diameter. You could maybe go with a radio beacon or something invisible but enforcement of requiring ID becomes very difficult.