The following from
http://legal-dictionary.thefreedictionary.com/crime
Crime
1. A crime is an offence against a public law. This word, in its most general signification, comprehends all offences but, in its limited sense, it is confined to felony.
A traffic violation is the breaking of a public law, hence a crime. What your describing is not a redefinition to a non-crime but a reclassification of crimes into three categories, rather than simply two (felony and misdemeaner).
If there is anyplace in the US, where someone being issued a traffic citation can refuse to provide their ID without consequence (such as arrest or impounding of the vehicle) then I certainly would like to know. I'd love nothing better than to ride without regard to the rules of the road and be able to tell the local cops to hose off...
Cops are granted a wide latitude in the matter of arrests. The only question later is how well the cop can articulate their reasons for the arrest.
BTW, can you provide a cite for any jurisdiction for a police procedural law? Other than constitutional protections, which are subject to judicial review I am aware of none. I am aware of police procedural policies, also known as departmental policies, but they do not have the color of law.