Navdy - Dangerous?

[GrasB]

Or rather more worrying - when you are focussing on the HUD you simply tune out the background image beyond it WITHOUT REALISING it. It gives you the impression that you are still "looking" where you are going simply because the image is still in that direction.

When you look down at your instruments you tune out the road as well. It's that the HUD removes a lot of the time it takes to do that but it's effectively not in your field of vision when looking down the road.

 

[Pete Owens]

When you look down at your instruments you tune out the road as well. It's that the HUD removes a lot of the time it takes to do that but it's effectively not in your field of vision when looking down the road.

But you are ignoring the psychology of how our image processing works:
When you glance down at your instruments you know you are looking away from the road so you need to look back.
When you concentrate on a HUD you have the perception that you are still looking at the road - you simply aren't payning attention to it.
Its just another example of the invisible dancing gorrila.

 

[GrasB]

When you concentrate on a HUD you have the perception that you are still looking at the road - you simply aren't payning attention to it.

You have to make a conscious decision to focus on the HUD. You're aware that you're looking at the details & not the road, it's just a much quicker operation. Also from experience it's much easier to pick up larger changes like an indicator flash or brake lights coming on. I have this documented on camera from my commentated drives.