Having said that, there are arguments to be made for a standard that uses heuristics to detect impaired driving for sure. Its harder to make the case if theres like a homomorphic data situation going on where your car can 1) use data and processi locally to detect potential impaired driving, 2) it stipulates loss of function in terms of abillity to further drive (pulls you over) in exchange for eliminating the potentialitt for crime, damage, and criminal chsrging process.
Its a goddamn loss of time, energy, and life to still have this problem. A car should not need to necessarily measure your BAC as evinced by breath to detect you're driving like a maniac and maybe it should pull over, lock, and contact assistance to the extent the law allows for you to be pulled aside and deal with a simple ticket/instant fine, no need for due process (instant feedback + administrative approach to offences).
The criminal aspect is bullshit because yes its a fucked up thing but people who are impaired are not thinking clearly or able to consent to committing a criminal act in th same way they can't consent to something as simple and hands-off (no pun intended) as being sexually fucked and still be considered to have had the agency to have been lawfully able to consent to that in the first place.
It really makes zero sense: 1) simple thing: receiving sexual intercourse 2) complex thing: driving car
You can do both these things drunk but your only assumed to have lacked agency in #1. Makes no sense to me, you're almost guranteed to fuck (up) your car [car non-consensually] if not yourself as the end result lol
EDIT: i'd appreciate if any lawyer or legal person or someone you know could critique this rationale and discuss how/why it is or isnt cogent and elaborate on the extent to which it could even be theoretically implemented, even [GASP?!] if it costs us all a lil bit of money/taxes/legislation to get us to that point in legal dtae of affairs