Earlier quoted context omitted.
I would say similar to the amount now, and less than passcode-based unlock Using your phone while driving is reckless, regardless of the authentication mechanism.
however the touch id does not require you to look at your phone to unlock and unconsciously people will look at an X to unlock it even though it only needs to see you, not the reverse. neither is a good idea but Apple recently pushed out lockouts for Do not disturb while driving. I have not tried this feature and it defaults to off. So how well it works, well it won't stop me from using the phone as it appears to be…
It explicitly will not unlock by default unless you are looking at the phone (or have disabled the "attention detection" feature), it detects the direction of your eyes presumably to prevent someone from surreptitiously pointing your phone at your face to unlock it while you are focusing elsewhere.
> By default, Face ID requires eye contact in order to work, but Federighi says you can disable the “attention detection” feature and Face ID will work whether you look directly at it or not.