They pop people for it every day so I reckon they do. But absent that there is a violation in most places for failure to maintain reasonable control of a vehicle. That is a solid principle that doesn't need to distinguish why someone is driving unsafely (drunk, stoned, texting, falling asleep - unsafe is unsafe). If "safety" is what you want that ought to work just fine. No need to make people do parlor tricks or for the taxpayers to spend time & money on chemical tests. The government police just does it's job - observes unsafe driving, cites for it, and proves it in court.
“The government police just does it’s job - observes unsafe driving, cites for it, and proves it in court.”
And with the billions of new tax dollars you hand the gubmint, they’ll be happy to make it as available as possible whenever and wherever...what a godsend for them...I’m sure they will use it just right...