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There is no requirement to identity yourself, but the police will regularly lock you up in jail until you do identify yourself. They can't _force_ you to identify youself, and you can't go to trial for not doing so (partially because they dont' know who you are, but even if they later find out for other means), but nevertheless police departments everywhere will lock you up until you provide ID if you are stopped for a traffic violation.
There is a guy around here-abouts who will routinely gets stopped for speeding and refuses to show ID out of principal. They put him in jail. He's tried to sue them, and lost.
This seems to conflate three separate issues: 1) being required to identify yourself (e.g., give a name and/or address and/or date-of-birth) 2) being required to "prove" your identity by producing some sort of credential 3) being required to have a valid drivers' license in your possession while driving Hopefully, we will be able to use cryptographic techniques to prevent (3) from being permanently associated with (1) and (2). I'm inclined to eliminate pre-testing and certification for drivers - cops who suspect that a certain person shouldn't be driving could administer some sort of (probably "VR" [ack, buzzwords!]) "road test" on the spot - people who pass are OK, and people who fail - because they're too young, too old, too drunk, too stupid, or too sleepy get punished for driving while incompetent. -----BEGIN PGP SIGNATURE----- Version: 2.5 iQCVAgUBLnZHCH3YhjZY3fMNAQGuwAP9HfTmL8NuheDpBojYvzDWAoJze9LnucCd k3hQnks5cXkrbYVIHsnW05VAzsEGlS6rAHo3CBoAh1lvPF49D+CZvttBKhWW9UTQ ibkLkoFEgdenSUENOuaF8CKF/Jy6zTROsqVAd1w0HaSLSq+I/RURZWny9Qh91hcg rWUbJOv//Xk= =2VHZ -----END PGP SIGNATURE-----