Not sure HUDs in cars will cause same issues. There aren't a lot of things to read on car HUDs that require direct concentrated focus. Every HUD I've seen have displayed the most minimal information. Usually the speed, map directions and media currently playing. Even the map directions usually only indicate the next step in route. So a quick glance is all that is required. Regular dashboard gauges require far more concertation. Especially if you're new to that specific vehicle.