Automatic braking alone is a huge deal: if you're a bit late in braking, you get a warning. If you go past that, brakes auto apply. When configured correctly, I don't even notice it's there 99.9% of the time...and the times I do I'm glad it's there, because the beep pulls you out of a momentary distraction.

The only problem is not every car on the road has it yet.

There is a moral hazard with ADAS + human drivers:

> Once drivers move from the novelty phase to the post-novelty operational phase, behavioral adaptation may begin to occur and overreliance and over-trust in the automation features potentially develop, including a greater willingness to look away from the forward road (as shown in the VCC data set). [1]

I'm not sure if this is more dangerous than strictly human-operated vehicles, but I would wager that it is more dangerous than strictly autonomous vehicles.

1. https://aaafoundation.org/research/understanding-the-impact-...

I recently implemented OpenPilot for my vehicle and used it on a 9 hour road trip.

Due to the nuances of my vehicle, the built-in hands-on-wheel nag was still active and required (small) driver wheel inputs every 10 seconds to prevent the beeps. Just keeping both hands on the wheel was enough to pacify the nag. But this forced me to keep attention on the vehicle, more than OpenPilot's face direction detector. Anecdotally I am certain this kept me more engaged than if I could have gone hands off.

The net effect was I had more capacity to be aware of what was going on around me on the road, AND I didn't feel nearly as fatigued at the end of the drive. Keeping the car between the lines consumes a little bit of cognitive energy constantly, which compounds over a long drive. Freeing up that load allowed me to pay more attention to what was happening on the rest of the road. And the mental burden was still half as much--I felt like I had driven maybe 4-5 hours instead of 9.

I have some ideas for how I might disable the built-in nag, but I'm pretty sure doing so would make my car less safe. The current configuration might already achieve the safety maximum for ADAS based on front-facing cameras only.

It increases situational awareness while reducing fatigue, and I think that anything further I try to do will adversely affect one or both of those effects.

The problem with mostly-but-not-entirely autonomous is that humans will tend to treat it like entirely autonomous.

An ADAS would be L4 if it was designed to be truly autonomous. If it's not designed to be truly autonomous, you have to somehow address the attention problem. Even a good attention monitoring system isn't sufficient, because people have the ability to appear superficially attentive by all external metrics, while not engaging with the driving task mentally.

The data to differentiate these levels is pretty limited for a variety of reasons, and the problem only worsens when you conflate AEB with ADAS as the IHS/IEEE do in this article rather than use an OEDR-based definition.