They don't actually need this
In the end, it comes down to control of the vehicle.
If you are texting while driving, you are in control of the vehicle... you are liable.
If you are talking to anyone, you are in control of the vehicle.... you are liable.
If you are eating while driving, you are in control of the vehicle.... you are liable.
If you skid off the road because of road conditions, you are still in control of the vehicle.... you are liable.
Bottom line: your backside is in the driver's seat. You are controlling the vehicle (if cruise control is on, you turned it on. You have made the decision to give control, but you are still responsible for what happens to it). Whatever happens, you are responsible. if you kill someone while driving, you should be cited for vehicular homicide, as you caused the car to hit the person (if the person 'just jumped out in front of you, you were driving recklessly, too fast for the conditions... its still your fault). If you skid off the road, your fault too (for the same reasons). LEO needs to simply apply the existing laws. Having a drivers license is a certification that you are responsible to drive... and if you are not, then you are committing a crime.... and it should simply be treated as such.