>the first thing the police ask is "did you get a good look at the driver" followed closely by "did you see the make/model/plates" and "what state was it registered in?"

If your argument for this law is that it forces people to incriminate themselves, that's really an argument that the whole thing should be thrown out.

Under no circumstances should you be able to be compelled to assist in your own prosecution, either directly or indirectly.